History of computing hardware (1960s–present)

History of computing

Hardware

* Hardware 1960s to present

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Timeline of computing

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This article is missing information about History outside of US and USSR. Please expand the article to include this information. Further details may exist on the talk page. (January 2024)

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The history of computing hardware starting at 1960 is marked by the conversion from vacuum tube to solid-state devices such as transistors and then integrated circuit (IC) chips. Around 1953 to 1959, discrete transistors started being considered sufficiently reliable and economical that they made further vacuum tube computers uncompetitive. Metal–oxide–semiconductor (MOS) large-scale integration (LSI) technology subsequently led to the development of semiconductor memory in the mid-to-late 1960s and then the microprocessor in the early 1970s. This led to primary computer memory moving away from magnetic-core memory devices to solid-state static and dynamic semiconductor memory, which greatly reduced the cost, size, and power consumption of computers. These advances led to the miniaturized personal computer (PC) in the 1970s, starting with home computers and desktop computers, followed by laptops and then mobile computers over the next several decades.

## Second generation

[edit]

See also: List of transistorized computers and Transistor computer

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For the purposes of this article, the term "second generation" refers to computers using discrete transistors, even when the vendors referred to them as "third-generation". By 1960 transistorized computers were replacing vacuum tube computers, offering lower cost, higher speeds, and reduced power consumption. The marketplace was dominated by IBM and the seven dwarfs:

* IBM
* The BUNCH
* Burroughs
* UNIVAC
* NCR
* Control Data Corporation (CDC)
* Honeywell
* General Electric
* RCA.

Some examples of 1960s second generation computers from those vendors are:

* the IBM 1401, the IBM 7090/7094, and the IBM System/360;
* the Burroughs 5000 series;
* the UNIVAC 1107;
* the NCR 315;
* the CDC 1604 and the CDC 3000 series;
* the Honeywell 200, Honeywell 400, and Honeywell 800;
* the GE-400 series and the GE-600 series;
* the RCA 301, 3301, 501, and the Spectra 70 series.

However, some smaller companies made significant contributions. Also, towards the end of the second generation Digital Equipment Corporation (DEC) was a serious contender in the small and medium machine marketplace.

Meanwhile, second-generation computers were also being developed in the USSR as, e.g., the Razdan family of general-purpose digital computers created at the Yerevan Computer Research and Development Institute.

The second-generation computer architectures initially varied; they included character-based decimal computers, sign-magnitude decimal computers with a 10-digit word, sign-magnitude binary computers, and ones' complement binary computers, although Philco, RCA, and Honeywell, for example, had some computers that were character-based binary computers and Digital Equipment Corporation (DEC) and Philco, for example, had two's complement computers. With the advent of the IBM System/360, two's complement became the norm for new product lines.

The most common word sizes for binary mainframes were 36 and 48 bits, although entry-level and midrange machines used smaller words, e.g., 12 bits, 18 bits, 24 bits, 30 bits. All but the smallest machines had asynchronous I/O channels and interrupts. Typically binary computers with word size up to 36 bits had one instruction per word, binary computers with 48 bits per word had two instructions per word and the CDC 60-bit machines could have two, three, or four instructions per word, depending on the instruction mix; the Burroughs B5000, B6500/B7500 and B8500 lines are notable exceptions to this.

First-generation computers with data channels (I/O channels) had a basic DMA interface to the channel cable. The second generation saw both simpler, e.g., channels on the CDC 6000 series had no DMA, and more sophisticated designs, e.g., the 7909 on the IBM 7090 had limited computational, conditional branching and interrupt system.

By 1960, magnetic core was the dominant memory technology, although there were still some new machines using drums and delay lines during the 1960s. Magnetic thin film and rod memory were used on some second-generation machines, but advances in core technology meant they remained niche players until semiconductor memory displaced both core and thin film.

In the first generation, word-oriented computers typically had a single accumulator and an extension, referred to as, e.g., Upper and Lower Accumulator, Accumulator and Multiplier-Quotient (MQ) register. In the second generation, it became common for computers to have multiple addressable accumulators. On some computers, e.g., PDP-6, the same registers served as accumulators and index registers, making them an early example of general-purpose registers.

In the second generation there was considerable development of new address modes, including truncated addressing on, e.g., the Philco TRANSAC S-2000, the UNIVAC III, and automatic index register incrementing on, e.g., the RCA 601, UNIVAC 1107, and the GE-600 series. Although index registers were introduced in the first generation under the name B-line, their use became much more common in the second generation. Similarly, indirect addressing became more common in the second generation, either in conjunction with index registers or instead of them. While first-generation computers typically had a small number of index registers or none, several lines of second-generation computers had large numbers of index registers, e.g., Atlas, Bendix G-20, IBM 7070.

The first generation had pioneered the use of special facilities for calling subroutines, e.g., TSX on the IBM 709. In the second generation, such facilities were ubiquitous; some examples are:

Automatically record the next sequential instruction (NSI) in a register for all or most successful branch instructions
The Jump Address (JA) Register on the Philco TRANSAC S-2000
The Sequence History (SH) and Cosequence History (CSH) registers on the Honeywell 800
The B register on an IBM 1401 with the indexing feature
Automatically record the NSI at a standard memory location following all or most successful branches
Store P (STP) locations on RCA 301, 3301 and 501
STICC on the RCA 601 is relative to the lower bound register
Call instructions that save the NSI in the first word of the subroutine
Return Jump (RJ) on the UNIVAC 1107
Return Jump (RJ) on CDC 3600 and CDC 6000 series
Jump to Subroutine (JSR) on the DEC PDP-6 and PDP-10
Call instructions that save the NSI in an implicit or explicit register
Branch and Load Location in Index Word (BLX) on the IBM 7070
Transfer and Set indeX (TSX) on the IBM 7090
Jump and Save PC (JSP) on the DEC PDP-6 and PDP-10
Transfer and Set Xn (TSXn) on the GE-600 series
Branch and Link (BAL) on the IBM System/360
Call instructions that use an index register as a stack pointer and push return information onto the stack
Push jump (PUSHJ) on the DEC PDP-6
Implicit call with return information pushed onto the stack
Program descriptors on the Burroughs B5000 line
Program descriptors on the Burroughs B6500 line

The second generation saw the introduction of features intended to support multiprogramming and multiprocessor configurations, including master/slave (supervisor/problem) mode, storage protection keys, limit registers, protection associated with address translation, and atomic instructions.

### Supercomputers

[edit]

Main article: History of supercomputing

Second generation supercomputers were substantially faster than most contemporary mainframes. Some of the technologies developed in order to achieve the desired performance are now used in commodity computers.

## Third generation

[edit]

See also: List of early third generation computers

The mass increase in the use of computers accelerated with Third Generation computers starting around 1966 in the commercial market. These generally relied on early (sub-1000 transistor) integrated circuit technology. The third generation ends with the microprocessor-based fourth generation.

In 1958, Jack Kilby at Texas Instruments invented the hybrid integrated circuit (hybrid IC),[1] which had external wire connections, making it difficult to mass-produce.[2] In 1959, Robert Noyce at Fairchild Semiconductor invented the monolithic integrated circuit (IC) chip.[3][2] It was made of silicon, whereas Kilby's chip was made of germanium. The basis for Noyce's monolithic IC was Fairchild's planar process, which allowed integrated circuits to be laid out using the same principles as those of printed circuits. The planar process was developed by Noyce's colleague Jean Hoerni in early 1959, based on the silicon surface passivation and thermal oxidation processes developed by Carl Frosch and Lincoln Derrick in 1955 and 1957.[4][5][6][7][8][9]

Computers using IC chips began to appear in the early 1960s. For example, the 1961 Semiconductor Network Computer (Molecular Electronic Computer, Mol-E-Com),[10][11][12] the first monolithic integrated circuit[13][14][15] general purpose computer (built for demonstration purposes, programmed to simulate a desk calculator) was built by Texas Instruments for the US Air Force.[16][17][18][19]

Some of their early uses were in embedded systems, notably used by NASA for the Apollo Guidance Computer, by the military in the LGM-30 Minuteman intercontinental ballistic missile, the Honeywell ALERT airborne computer,[20][21] and in the Central Air Data Computer used for flight control in the US Navy's F-14A Tomcat fighter jet.

An early commercial use was the 1965 SDS 92.[22][23] IBM first used ICs in computers for the logic of the System/360 Model 85 shipped in 1969 and then made extensive use of ICs in its System/370 which began shipment in 1971.

The integrated circuit enabled the development of much smaller computers. The minicomputer was a significant innovation in the 1960s and 1970s. It brought computing power to more people, not only through more convenient physical size but also through broadening the computer vendor field. Digital Equipment Corporation became the number two computer company behind IBM with their popular PDP and VAX computer systems. Smaller, affordable hardware also brought about the development of important new operating systems such as Unix.

1969: Data General Nova

In November 1966, Hewlett-Packard introduced the 2116A[24][25] minicomputer, one of the first commercial 16-bit computers. It used CTμL (Complementary Transistor MicroLogic)[26] in integrated circuits from Fairchild Semiconductor. Hewlett-Packard followed this with similar 16-bit computers, such as the 2115A in 1967,[27] the 2114A in 1968,[28] and others.

In 1969, Data General introduced the Nova and shipped a total of 50,000 at $8,000 each. The popularity of 16-bit computers, such as the Hewlett-Packard 21xx series and the Data General Nova, led the way toward word lengths that were multiples of the 8-bit byte. The Nova was first to employ medium-scale integration (MSI) circuits from Fairchild Semiconductor, with subsequent models using large-scale integrated (LSI) circuits. Also notable was that the entire central processor was contained on one 15-inch printed circuit board.

Large mainframe computers used ICs to increase storage and processing abilities. The 1965 IBM System/360 mainframe computer family are sometimes called third-generation computers; however, their logic consisted primarily of SLT hybrid circuits, which contained discrete transistors and diodes interconnected on a substrate with printed wires and printed passive components; the S/360 M85 and M91 did use ICs for some of their circuits. IBM's 1971 System/370 used ICs for their logic, and later models used semiconductor memory.

By 1971, the ILLIAC IV supercomputer was the fastest computer in the world, using about a quarter-million small-scale ECL logic gate integrated circuits to make up sixty-four parallel data processors.[29]

Third-generation computers were offered well into the 1990s; for example the IBM ES9000 9X2 announced April 1994[30] used 5,960 ECL chips to make a 10-way processor.[31] Other third-generation computers offered in the 1990s included the DEC VAX 9000 (1989), built from ECL gate arrays and custom chips,[32] and the Cray T90 (1995).

## Fourth generation

[edit]

Third-generation minicomputers were essentially scaled-down versions of mainframe computers, designed to perform similar tasks but on a smaller and more accessible scale. In contrast, the fourth generation's origins are fundamentally different, as it is based on the microprocessor—a computer processor integrated onto a single large-scale integration (LSI) MOS integrated circuit chip.[33]

Microprocessor-based computers were originally very limited in their computational ability and speed and were in no way an attempt to downsize the minicomputer. They were addressing an entirely different market.

Processing power and storage capacities have grown beyond all recognition since the 1970s, but the underlying technology has remained basically the same of large-scale integration (LSI) or very-large-scale integration (VLSI) microchips, so it is widely regarded that most of today's computers still belong to the fourth generation.

### Microprocessors

[edit]

1971: Intel 4004

The microprocessor has origins in the MOS integrated circuit (MOS IC) chip.[33] The MOS IC was fabricated by Fred Heiman and Steven Hofstein at RCA in 1962.[34] Due to rapid MOSFET scaling, MOS IC chips rapidly increased in complexity at a rate predicted by Moore's law, leading to large-scale integration (LSI) with hundreds of transistors on a single MOS chip by the late 1960s. The application of MOS LSI chips to computing was the basis for the first microprocessors, as engineers began recognizing that a complete computer processor could be contained on a single MOS LSI chip.[33]

The earliest multi-chip microprocessors were the Four-Phase Systems AL1 in 1969 and Garrett AiResearch MP944 in 1970, each using several MOS LSI chips.[33] On November 15, 1971, Intel released the world's first single-chip microprocessor, the 4004, on a single MOS LSI chip. Its development was led by Federico Faggin, using silicon-gate MOS technology, along with Ted Hoff, Stanley Mazor and Masatoshi Shima.[35] It was developed for a Japanese calculator company called Busicom as an alternative to hardwired circuitry, but computers were developed around it, with much of their processing abilities provided by one small microprocessor chip. The dynamic RAM (DRAM) chip was based on the MOS DRAM memory cell developed by Robert Dennard of IBM, offering kilobits of memory on one chip. Intel coupled the RAM chip with the microprocessor, allowing fourth generation computers to be smaller and faster than prior computers. The 4004 was only capable of 60,000 instructions per second, but its successors brought ever-growing speed and power to computers, including the Intel 8008, 8080 (used in many computers using the CP/M operating system), and the 8086/8088 family. (The IBM personal computer (PC) and compatibles use processors that are still backward-compatible with the 8086.) Other producers also made microprocessors which were widely used in microcomputers.

The following table shows a timeline of significant microprocessor development.

Year | Microprocessors

|

1969 | Four-Phase Systems AL1
1970 | Texas Instruments TMX 1795
1971 | Texas Instruments TMS 1802NC
1971 | Intel 4004
1972 | Fairchild PPS-25; Intel 8008; Rockwell PPS-4
1973 | Burroughs Mini-D; National Semiconductor IMP-16; NEC μCOM
1974 | General Instrument CP1600; Intel 4040, 8080; Mostek 5065; Motorola 6800; National Semiconductor IMP-4, IMP-8, ISP-8A/500, PACE; Texas Instruments TMS 1000; Toshiba TLCS-12
1975 | Fairchild F8; Hewlett Packard BPC; Intersil 6100; MOS Technology 6502; RCA CDP 1801; Rockwell PPS-8; Signetics 2650; Western Digital MCP-1600
1976 | RCA CDP 1802; Signetics 8X300; Texas Instruments TMS9900; Zilog Z80
1977 | Intel 8085
1978 | Intel 8086; Motorola 6801, 6809
1979 | Intel 8088; Motorola 68000; Zilog Z8000
1980 | National Semiconductor 16032; Intel 8087
1981 | DEC T11; Harris 6120; IBM ROMP
1982 | Hewlett-Packard FOCUS; Intel 80186, 80188, 80286; DEC J-11; Berkeley RISC-I
1983 | Stanford MIPS; Berkeley RISC-II
1984 | Motorola 68020; National Semiconductor 32032; NEC V20
1985 | DEC MicroVAX 78032/78132; Harris Novix; Intel 80386; MIPS R2000
1986 | NEC V60; Sun SPARC MB86900/86910; Zilog Z80000
1987 | Acorn ARM2; DEC CVAX 78034; Hitachi Gmicro/200; Motorola 68030; NEC V70
1988 | Apollo PRISM; Intel 80386SX, i960; MIPS R3000
1989 | DEC VAX DC520 Rigel; Intel 80486, i860
1990 | IBM POWER1; Motorola 68040
1991 | DEC NVAX; IBM RSC; MIPS R4000
1992 | DEC Alpha 21064; Hewlett-Packard PA-7100; Sun microSPARC I
1993 | IBM POWER2, PowerPC 601; Intel Pentium; Hitachi SuperH
1994 | DEC Alpha 21064A; Hewlett-Packard PA-7100LC, PA-7200; IBM PowerPC 603, PowerPC 604, ESA/390 G1; Motorola 68060; QED R4600; NEC V850
1995 | DEC Alpha 21164; HAL Computer SPARC64; Intel Pentium Pro; Sun UltraSPARC; IBM ESA/390 G2
1996 | AMD K5; DEC Alpha 21164A; HAL Computer SPARC64 II; Hewlett Packard PA-8000; IBM P2SC, ESA/390 G3; MTI R10000; QED R5000
1997 | AMD K6; IBM PowerPC 620, PowerPC 750, RS64, ESA/390 G4; Intel Pentium II; Sun UltraSPARC IIs
1998 | DEC Alpha 21264; HAL Computer SPARC64 III; Hewlett Packard PA-8500; IBM POWER3, RS64-II, ESA/390 G5; QED RM7000; SGI MIPS R12000
1999 | AMD Athlon; IBM RS64-III; Intel Pentium III; Motorola PowerPC 7400
2000 | AMD Athlon XP, Duron; Fujitsu SPARC64 IV; IBM RS64-IV, z900; Intel Pentium 4
2001 | IBM POWER4; Intel Itanium; Motorola PowerPC 7450; SGI MIPS R14000; Sun UltraSPARC III
2002 | Fujitsu SPARC64 V; Intel Itanium 2
2003 | AMD Opteron, Athlon 64; IBM PowerPC 970; Intel Pentium M
2004 | IBM POWER5, PowerPC BGL
2005 | AMD Athlon 64 X2, Opteron Athens; IBM PowerPC 970MP, Xenon; Intel Pentium D; Sun UltraSPARC IV, UltraSPARC T1
2006 | IBM Cell/B.E., z9; Intel Core 2, Core Duo, Itanium Montecito
2007 | AMD Opteron Barcelona; Fujitsu SPARC64 VI; IBM POWER6, PowerPC BGP; Sun UltraSPARC T2; Tilera TILE64
2008 | AMD Opteron Shanghai, Phenom; Fujitsu SPARC64 VII; IBM PowerXCell 8i, z10; Intel Atom, Core i7; Tilera TILEPro64
2009 | AMD Opteron Istanbul, Phenom II
2010 | AMD Opteron Magny-cours; Fujitsu SPARC64 VII+; IBM POWER7, z196; Intel Itanium Tukwila, Westmere, Nehalem-EX; Sun SPARC T3
2011 | AMD FX Bulldozer, Interlagos, Llano; Fujitsu SPARC64 VIIIfx; Freescale PowerPC e6500; Intel Sandy Bridge, Xeon E7; Oracle SPARC T4
2012 | Fujitsu SPARC64 IXfx; IBM POWER7+, zEC12; Intel Itanium Poulson; Apple A6
2013 | Fujitsu SPARC64 X; Intel Haswell; Oracle SPARC T5
2014 | IBM POWER8
2015 | IBM z13
2017 | IBM POWER9, z14; AMD Ryzen
2020 | Apple M1

### Supercomputers

[edit]

Main article: History of supercomputing

1976: Cray-1 supercomputer

The powerful supercomputers of the era were at the other end of the computing spectrum from the microcomputers, and they also used integrated circuit technology. In 1976, the Cray-1 was developed by Seymour Cray, who had left Control Data in 1972 to form his own company. This machine was the first supercomputer to make vector processing practical. It had a characteristic horseshoe shape to speed processing by shortening circuit paths. Vector processing uses one instruction to perform the same operation on many arguments; it has been a fundamental supercomputer processing method ever since. The Cray-1 could calculate 150 million floating-point operations per second (150 megaflops). 85 were shipped at a price of $5 million each. The Cray-1 had a CPU that was mostly constructed of SSI and MSI ECL ICs.

## Mainframes and minicomputers

[edit]

Time-sharing computer terminals connected to central computers, such as the TeleVideo ASCII character mode smart terminal pictured here, were sometimes used before the advent of the PC.

Computers were generally large, costly systems owned by large institutions before the introduction of the microprocessor in the early 1970s—corporations, universities, government agencies, and the like. Users were experienced specialists who did not usually interact with the machine itself, but instead prepared tasks for the computer on off-line equipment, such as card punches. A number of assignments for the computer would be gathered up and processed in batch mode. After the jobs had completed, users could collect the output printouts and punched cards. In some organizations, it could take hours or days between submitting a job to the computing center and receiving the output.

A more interactive form of computer use developed commercially by the middle 1960s. In a time-sharing system, multiple teleprinter and display terminals let many people share the use of one mainframe computer processor, with the operating system assigning time slices to each user's jobs. This was common in business applications and in science and engineering.

A different model of computer use was foreshadowed by the way in which early, pre-commercial, experimental computers were used, where one user had exclusive use of a processor.[36] Some of the first computers that might be called "personal" were early minicomputers such as the LINC and PDP-8, and later on VAX and larger minicomputers from Digital Equipment Corporation (DEC), Data General, Prime Computer, and others. They originated as peripheral processors for mainframe computers, taking on some routine tasks and freeing the processor for computation.

By today's standards, they were physically large (about the size of a refrigerator) and costly (typically tens of thousands of US dollars), and thus were rarely purchased by individuals. However, they were much smaller, less expensive, and generally simpler to operate than the mainframe computers of the time, and thus affordable by individual laboratories and research projects. Minicomputers largely freed these organizations from the batch processing and bureaucracy of a commercial or university computing center.

In addition, minicomputers were more interactive than mainframes, and soon had their own operating systems. The minicomputer Xerox Alto (1973) was a landmark step in the development of personal computers, because of its graphical user interface, bit-mapped high-resolution screen, large internal and external memory storage, mouse, and special software.[37]

## Microcomputers

[edit]

### Microprocessor and cost reduction

[edit]

In the minicomputer ancestors of the modern personal computer, processing was carried out by circuits with large numbers of components arranged on multiple large printed circuit boards. Minicomputers were consequently physically large and expensive to produce compared with later microprocessor systems. After the "computer-on-a-chip" was commercialized, the cost to produce a computer system dropped dramatically. The arithmetic, logic, and control functions that previously occupied several costly circuit boards were now available in one integrated circuit which was very expensive to design but cheap to produce in large quantities. Concurrently, advances in developing solid state memory eliminated the bulky, costly, and power-hungry magnetic-core memory used in prior generations of computers.

### Micral N

[edit]

1973: Micral N

Main article: Micral

In France, the company R2E (Réalisations et Etudes Electroniques) formed by five former engineers of the Intertechnique company, André Truong Trong Thi[38][39] and François Gernelle[40] introduced in February 1973 a microcomputer, the Micral N based on the Intel 8008.[41] Originally, the computer had been designed by Gernelle, Lacombe, Beckmann and Benchitrite for the Institut National de la Recherche Agronomique to automate hygrometric measurements.[42][43] The Micral N cost a fifth of the price of a PDP-8, about 8500FF ($1300). The clock of the Intel 8008 was set at 500 kHz, the memory was 16 kilobytes. A bus, called Pluribus was introduced and allowed connection of up to 14 boards. Different boards for digital I/O, analog I/O, memory, floppy disk were available from R2E.

### Altair 8800 and IMSAI 8080

[edit]

Main articles: Altair 8800 and IMSAI 8080

The development of the single-chip microprocessor was an enormous catalyst to the popularization of cheap, easy to use, and truly personal computers. The Altair 8800, introduced in a Popular Electronics magazine article in the January 1975 issue, at the time set a new low price point for a computer, bringing computer ownership to an admittedly select market in the 1970s. This was followed by the IMSAI 8080 computer, with similar abilities and limitations. The Altair and IMSAI were essentially scaled-down minicomputers and were incomplete: to connect a keyboard or teleprinter to them required heavy, expensive "peripherals". These machines both featured a front panel with switches and lights, which communicated with the operator in binary. To program the machine after switching it on the bootstrap loader program had to be entered, without error, in binary, then a paper tape containing a BASIC interpreter loaded from a paper-tape reader. Keying the loader required setting a bank of eight switches up or down and pressing the "load" button, once for each byte of the program, which was typically hundreds of bytes long. The computer could run BASIC programs once the interpreter had been loaded.

1975: Altair 8800

The MITS Altair, the first commercially successful microprocessor kit, was featured on the cover of Popular Electronics magazine in January 1975. It was the world's first mass-produced personal computer kit, as well as the first computer to use an Intel 8080 processor. It was a commercial success with 10,000 Altairs being shipped. The Altair also inspired the software development efforts of Paul Allen and his high school friend Bill Gates who developed a BASIC interpreter for the Altair, and then formed Microsoft.

The MITS Altair 8800 effectively created a new industry of microcomputers and computer kits, with many others following, such as a wave of small business computers in the late 1970s based on the Intel 8080, Zilog Z80 and Intel 8085 microprocessor chips. Most ran the CP/M-80 operating system developed by Gary Kildall at Digital Research. CP/M-80 was the first popular microcomputer operating system to be used by many different hardware vendors, and many software packages were written for it, such as WordStar and dBase II.

Many hobbyists during the mid-1970s designed their own systems, with various degrees of success, and sometimes banded together to ease the job. Out of these house meetings, the Homebrew Computer Club developed, where hobbyists met to talk about what they had done, exchange schematics and software, and demonstrate their systems. Many people built or assembled their own computers as per published designs. For example, many thousands of people built the Galaksija home computer later in the early 1980s.

The Altair was influential. It came before Apple Computer, as well as Microsoft which produced and sold the Altair BASIC programming language interpreter, Microsoft's first product. The second generation of microcomputers, those that appeared in the late 1970s, sparked by the unexpected demand for the kit computers at the electronic hobbyist clubs, were usually known as home computers. For business use these systems were less capable and in some ways less versatile than the large business computers of the day. They were designed for fun and educational purposes, not so much for practical use. And although you could use some simple office/productivity applications on them, they were generally used by computer enthusiasts for learning to program and for running computer games, for which the personal computers of the period were less suitable and much too expensive. For the more technical hobbyists home computers were also used for electronically interfacing to external devices, such as controlling model railroads, and other general hobbyist pursuits.

### Microcomputer emerges

[edit]

Main article: History of personal computers

The "Big Three" computers of 1977: from left to right, the Commodore PET (PET 2001 model shown), the standard Apple II (with two Disk II drives) and the TRS-80 Model I.

Main article: Personal computer

The advent of the microprocessor and solid-state memory made home computing affordable. Early hobby microcomputer systems such as the Altair 8800 and Apple I introduced around 1975 marked the release of low-cost 8-bit processor chips, which had sufficient computing power to be of interest to hobby and experimental users. By 1977 pre-assembled systems such as the Apple II, Commodore PET, and TRS-80 (later dubbed the "1977 Trinity" by Byte Magazine)[44] began the era of mass-market home computers; much less effort was required to obtain an operating computer, and applications such as games, word processing, and spreadsheets began to proliferate. Distinct from computers used in homes, small business systems were typically based on CP/M, until IBM introduced the IBM PC, which was quickly adopted. The PC was heavily cloned, leading to mass production and consequent cost reduction throughout the 1980s. This expanded the PC's presence in homes, replacing the home computer category during the 1990s and leading to the current monoculture of architecturally identical personal computers.

## Timeline of computer systems and important hardware

[edit]

Year | Hardware

|

1958 | Transistors: IBM 7070
1959 | IBM 7090; IBM 1401
1960 | DEC PDP-1; CDC 1604; Honeywell 800
1961 | Fairchild resistor transistor logic; IBM 7080
1962 | NPN transistor; UNIVAC 1107
1963 | Mouse; CMOS patented; CDC 3600
1964 | CDC 6600; IBM System/360; IBM Data Cell Drive; UNIVAC 1108; DEC PDP-6
1965 | DEC PDP-8; IBM 1130
1966 | Integrated circuits: HP 2116A;[24] Apollo Guidance Computer; DEC PDP-10
1967 | Fairchild built first MOS; Engelbart applies for mouse patent
1969 | Data General Nova
1969 | Honeywell 316
1970 | DEC PDP-11; IBM System/370
1971 | 8" floppy disk; ILLIAC IV
1972 | Atari founded; Cray Research founded; HP 3000
1973 | Micral N \- first microprocessor PC
1974 | Altair 8800; Data General Eclipse
1975 | Olivetti P6060; Cray-1
1976 | Tandem/16
1977 | Apple II; TRS-80 Model 1; Commodore PET; 5.25" floppy
1978 | DEC VAX-11
1979 | Atari 400/800
1980 | Sinclair ZX80, Seagate hard disk drive, VIC-20
1981 | IBM PC, BBC Micro
1982 | Commodore 64, ZX Spectrum
1983 | Apple Lisa, MSX, 3.5" floppy
1984 | Macintosh; Apple Lisa 2
1985 | PC's Limited (renamed Dell Computer Corporation in 1988); Amiga 1000
1986 | Tandem NonStop VLX
1987 | Thinking Machines CM2; Tera Computer founded
1988 | Dell
1989 | NeXT Computer
1990 | ETA10; CD-R
1992 | HP 95LX; Palmtop PC
1993 | Intel PPGA
1994 | Apple switches to PowerPC; VESA Local Bus
1995 | IBM Deep Blue chess computer
1996 | USB 1.0
1997 | Compaq buys Tandem; CD-RW
1998 | iMac
1999 | First BlackBerry device (850)
2000 | USB 2
2003 | Arduino
2005 | Mac Mini; World's first desktop dual-core CPU Athlon 64 X2
2006 | Mac transition to Intel processors
2007 | First-generation iPhone
2008 | USB 3.0
2010 | Apple iPad
2012 | IBM zEnterprise System; Raspberry Pi
2015 | HoloLens

## See also

[edit]

* History of computing hardware, before the 1960s
* Influence of the IBM PC on the personal computer market
* Timeline of computing
* History of Computer Software
* CPU design, a technical discussion of computing history
* History of operating systems
* History of the Internet
* History of the graphical user interface
* Timeline of programming languages
* Hardware description language
* Hardware abstraction layer
* Computer architecture, how computers are designed
* List of fictional computers
* Fifth generation computer
* Quantum computing
* Curta calculator
* List of pioneers in computer science
* Pirates of Silicon Valley, docudrama about Apple Inc. and Microsoft's early days
* Triumph of the Nerds
* Ubiquitous computing
* Internet of things
* Fog computing
* Edge computing
* Ambient intelligence
* System on a chip
* Network on a chip

## Notes

[edit]

1. ^ Saxena, Arjun N. (2009). Invention of Integrated Circuits: Untold Important Facts. World Scientific. p. 140\. ISBN 9789812814456.
2. ^ a b "Integrated circuits". NASA. Retrieved 13 August 2019.
3. ^ "1959: Practical Monolithic Integrated Circuit Concept Patented". Computer History Museum. Retrieved 13 August 2019.
4. ^ US2802760A, Lincoln, Derick & Frosch, Carl J., "Oxidation of semiconductive surfaces for controlled diffusion", issued 1957-08-13
5. ^ Lojek, Bo (2007). History of Semiconductor Engineering. Springer Science & Business Media. p. 120\. ISBN 9783540342588.
6. ^ Frosch, C. J.; Derick, L (1957). "Surface Protection and Selective Masking during Diffusion in Silicon". Journal of the Electrochemical Society. 104 (9): 547. doi:10.1149/1.2428650.
7. ^ Moskowitz, Sanford L. (2016). Advanced Materials Innovation: Managing Global Technology in the 21st century. John Wiley & Sons. p. 168\. ISBN 978-0-470-50892-3.
8. ^ Christophe Lécuyer; David C. Brook; Jay Last (2010). Makers of the Microchip: A Documentary History of Fairchild Semiconductor. MIT Press. pp. 62–63\. ISBN 978-0-262-01424-3.
9. ^ Claeys, Cor L. (2003). ULSI Process Integration III: Proceedings of the International Symposium. The Electrochemical Society. pp. 27–30\. ISBN 978-1-56677-376-8.
10. ^ "1961 PICTORIAL REPORT ON THE COMPUTER FIELD: 5. Computer Component". Computers and Automation. 10 (12): 85. Dec 1961.
11. ^ "Miniature computer". New Scientist (260). Reed Business Information. 9 November 1961. Archived from the original on 7 April 2022. Retrieved 12 November 2020.
12. ^ "First Integrated Circuit Computer". Archived from the original on 8 January 2006.
13. ^ IRE International Convention Record. IRE International Convention. Vol. 10\. Institute of Radio Engineers. March 1962. p. 50\. OCLC 879918181.
14. ^ "Series 51 RCTL". Bulletin SCA-1000: Digital Semiconductor Integrated Circuits. Texas Instruments. Jan 1965. pp. 2–3, 9–11.
15. ^ Dummer, G. W. A.; Robertson, J. Mackenzie (2014). "Texas Instruments Series 51 Semiconductor Networks". American Microelectronics Data Annual 1964–65. Elsevier. pp. 596–650\. ISBN 9781483185491.
16. ^ "1962: Aerospace systems are the first applications for ICs in computers". "IC at fifty" booklet. 2009. pp. 26, 22 (28, 24).
17. ^ "Molecular Electronic Computer brochure | 102646283 | Computer History Museum". www.computerhistory.org. 1961. Retrieved 2018-03-13.
18. ^ Silicon Semiconductor Networks Manufacturing Methods (PDF) (Technical report). 1962. pp. 67–113\. AD0273850.
19. ^ "Section VI: Theory of Operation of the ASD Semiconductor-Network Computer". Silicon Semiconductor Networks Manufacturing Methods (Technical report). 1962. pp. 67–113.
20. ^ Programmer's Reference Manual, Honeywell ALERT General Purpose General Computer (PDF) (Third ed.). Honeywell. June 1966.
21. ^ "Honeywell ALERT General Purpose Digital Computer". 1965. Alt URL
22. ^ TH EINDUSTRIAL REORGANIZATION ACT. Columns: Manufacturer and name of computer | Solid state? | Average monthly rentals | Date of 1st installation | Number of installations | Number of unfilled orders. 1974. p. 5577.`{{cite book}}`: CS1 maint: others (link)
23. ^ Brock, Gerald W. (1975). The U.S. computer industry: a study of market power. Ballinger Pub. Co. p. 192\. ISBN 9780884102618.
24. ^ a b "History of the 2116A digital computer".
25. ^ "HP: The Accidentally, On-Purpose Computer Company".
26. ^ "Fairchild CTμL Integrated Circuits". Archived from the original on 2015-09-23.
27. ^ "HP 2115A". HP Computer Museum. Retrieved 11 August 2015.
28. ^ "HP 2114S". HP Computer Museum. Retrieved 11 August 2015.
29. ^ D. A. Slotnick, The Fastest Computer, Scientific American February 1971, reprinted in Computers and Computation, Freeman and Company, San Francisco, California, 1971, ISBN 0-7167-0936-8
30. ^ "IBM ES/9000 Water-Cooled Processor Enhancements: New Ten-Way Processor, Parallel Sysplex Capability, and Additional Functions". IBM. April 6, 1994. Announcement Number: 194-084.
31. ^ Rao, G. S.; Gregg, T. A.; Price, C. A.; Rao, C. L.; Repka, S. J. "IBM S/390 Parallel Enterprlse Servers G3 and G4" (PDF). IBM Journal of Research and Development. 41 (4/5). S2CID 18459824. Archived from the original (PDF) on 2019-03-06.
32. ^ Adiletta, Matthew J.; Doucette, Richard L.; Hackenberg, John H.; Leuthold, Dale H.; Litwinetz, Denis M. (Fall 1990). "Semiconductor Technology in a High-performance VAX System" (PDF). Digital Technical Journal. 2 (4).
33. ^ a b c d Shirriff, Ken (30 August 2016). "The Surprising Story of the First Microprocessors". IEEE Spectrum. 53 (9). Institute of Electrical and Electronics Engineers: 48–54\. doi:10.1109/MSPEC.2016.7551353. S2CID 32003640. Retrieved 13 October 2019.
34. ^ "Tortoise of Transistors Wins the Race – CHM Revolution". Computer History Museum. Retrieved 22 July 2019.
35. ^ "1971: Microprocessor Integrates CPU Function onto a Single Chip". Computer History Museum. Retrieved 22 July 2019.
36. ^ Anthony Ralston and edwin D. Reilly (ed), Encyclopedia of Computer Science 3rd Edition, Van Nostrand Reinhold, 1993 ISBN 0-442-27679-6, article Digital Computers History
37. ^ Rheingold, H. (2000). Tools for thought: the history and future of mind-expanding technology (New ed.). Cambridge, Massachusetts, etc.: The MIT Press.
38. ^ "Décès d'André Truong, inventeur du micro-ordinateur". ZDNet France. 6 April 2005. Retrieved 11 August 2015.
39. ^ "André Truong, père du micro-ordinateur, nous a quittés Actualité - Silicon.fr". Archived from the original on 2008-05-14. Retrieved 2008-03-15.
40. ^ Gernelle creator of the first micro computer Archived 2002-02-09 at the Wayback Machine
41. ^ Roy A. Allan A History of the Personal Computer (Alan Publishing, 2001) ISBN 0-9689108-0-7 Chapter 4 (PDF: https://archive.org/download/A_History_of_the_Personal_Computer/eBook04.pdf)
42. ^ "Groupe BULL chronology". Archived from the original on 10 December 2008. Retrieved 11 August 2015.
43. ^ "OLD-COMPUTERS.COM Museum - R2E MICRAL-N". Archived from the original on 23 July 2023. Retrieved 11 August 2015.
44. ^ "Most Important Companies". Byte. September 1995. Archived from the original on 2008-06-18. Retrieved 2008-06-10.

## References

[edit]

* Freiberger, Paul; Swaine, Michael (2000) [1984]. Fire in the Valley: The Making of the Personal Computer (2nd ed.). New York: McGraw-Hill. ISBN 0-07-135892-7.

## External links

[edit]

* Stephen White's Computer history site (the above article is a modified version of his work, used with permission)
* Digital Deli, edited by Steve Ditlea, full text of the classic computer book
* Collection of old analog and digital computers at Old Computer Museum
* ZX81 Computer Online Museum
* Yahoo Computers and History
* IEEE computer history timeline (Archive from 2005)
* Links to all things Commodore
* A homebrew computer club site
* Computer History Museum
* Pictures and information on old computers
* PowerSource Online: New, Used, Refurbished, Hard to Find Parts, Equipment & Services
* History of Computers (1989–2004) in PC World excerpts
* How It Works – The Computer, 1971 and 1979 editions, by David Carey, illustrated by B. H. Robinson
* PC History Stan Veit's classic work on the history of Pre-IBM personal computers.
* WWW-VL: Internet History Archived 2020-05-28 at the Wayback Machine

* v
* t
* e

Basic computer components

Input devices|

| Pointing devices|

* Graphics tablet
* Game controller
* Light pen
* Mouse
* Optical
* Optical trackpad
* Pointing stick
* Touchpad
* Touchscreen
* Trackball

|

Other|

* Keyboard
* Image scanner
* Graphics card
* GPU
* Microphone
* Refreshable braille display
* Sound card
* Sound chip
* Webcam
* Softcam

Output devices|

* Monitor
* Screen
* Refreshable braille display
* Printer
* Plotter
* Speakers
* Sound card
* Graphics card

Removable
data storage|

* Disk pack
* Floppy disk
* Optical disc
* CD
* DVD
* Blu-ray
* Flash memory
* Memory card
* USB flash drive

Computer case|

* Central processing unit
* Microprocessor
* Motherboard
* Memory
* RAM
* BIOS
* Data storage
* HDD
* SSD (SATA / NVMe)
* SSHD
* Power supply
* SMPS
* MOSFET
* Power MOSFET
* VRM
* Network interface controller
* Fax modem
* Expansion card

Ports|

| Current|

* Ethernet
* USB
* Thunderbolt
* Analog audio jack
* DisplayPort
* HDMI

|

Obsolete|

* FireWire (IEEE 1394)
* Parallel port
* Serial port
* Game port
* PS/2 port
* eSATA
* DVI
* VGA

Related|

* History of computing hardware
* History of computing hardware (1960s–present)
* List of pioneers in computer science

* v
* t
* e

Mainframe computers

Australia|

* SILLIAC (1956)

Israel|

* WEIZAC (1955)

Japan|

* FACOM (1954)
* FUJIC (1949)

Sweden|

* SARA (1957)
* SMIL (1956)
* EDB-1 (1957)
* TRASK (1964)

Soviet Union|

* BESM-6
* ES-2701 [ru]
* Mars [ru]
* PS-2000
* PS-3000 [ru]
* SVS [ru]
* Elbrus
* Electronika SS VLSI [ru]
* See also: Soviet computer systems

United States|

| IAS family|

| 1950s|

* ILLIAC (1952)
* AVIDAC (1953)
* BESK (1953)
* IBM 701 (1953)
* JOHNNIAC (1953)
* ORACLE (1953)
* ORDVAC (1952)
* WEIZAC (1955)
* DASK (1955)
* SARA (1957)
* SILLIAC (1956)
* SMIL (1956)
* MANIAC I (1956)
* MANIAC II (1956)
* MISTIC (1957)
* MUSASINO-1 (1957)
* EDB-1 (1957)
* EDB-2/3 (1957)
* Cyclone (1959)

|

1960s|

* FACOM 201 (1960)
* TRASK (1964)

University of Illinois|

* ORDVAC (1952)
* ILLIAC I (1952)
* ILLIAC II (1958)
* ILLIAC III (1966)
* ILLIAC IV (1965)
* CEDAR (1988)
* ILLIAC 6 (2005)
* Trusted ILLIAC (2006)

Harvard University|

* Harvard Mark I (1944)
* Harvard Mark II (1947)
* Harvard Mark III (1949)
* Harvard Mark IV (1952)

IBM|

* v
* t
* e

IBM vacuum tube computers

* 305 RAMAC
* 610
* 650
* 701
* 702
* 704
* 705
* 709

SAGE|

* AN/FSQ-7
* AN/FSQ-8

Mainframes

University of Pennsylvania|

* ENIAC (1945)

EMCC|

* EDVAC (1949)
* UNIVAC I (1951)

Remington–Sperry Rand|

* UNIVAC II
* See also: Computers built 1955–1978

Raytheon|

* RAYDAC (1953)

United Kingdom|

* Colossus computer (1943)

Related|

* Transistor computer
* list
* Vacuum-tube computer
* list
* History of computing hardware
* History of computing hardware (1960s–present)
* List of pioneers in computer science

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*[t]: Discuss this template
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