Calculator watch

Short description: Type of watch with calculator functionality

Casio CFX-400 scientific calculator watch circa 1985.

thumb|right|A HP-01 calculator watch

A CFX-200 scientific calculator watch, it has trigonometric functions and scientific conversion capabilities.

The μWatch, an open-source DIY scientific calculator watch

Casio CMD-40 calculator watch with built-in remote control

The Casio TC500 touch sensor calculator watch from 1983. It uses a capacitive touch screen for the calculator and function buttons.

A calculator watch is a digital watch with a built-in calculator, usually including buttons on the watch face. Calculator watches were first introduced in the 1970s and continue to be produced, despite falling from their peak popularity during the 1980s. The most dominant brands were the Casio Databank series and Timex.

Most calculator watches perform only basic arithmetic operations (addition, subtraction, multiplication, and division). However, there are several models with additional functions: scientific, including transcendent and trigonometry, in models Casio CFX-20, CFX-200, CFX-400 and Citizen 49–9421, financial functions (Casio CBA-10) and also TV remote control functions (CMD-40B and CMD-30B).

Usually, calculator watches operate with eight-digit numbers; however, calculator watches can work with six digits (for example, Casio C-801) or ten-digit (Casio CBA-10).878

## Contents

* 1 History
* 2 See also
* 3 References
* 4 External links

## History

Timex CA3A0441 calculator watch

Calculator watches first appeared in the mid-1970s introduced by Pulsar (1975, then a brand of the Hamilton Watch Company)[1][2][3] and Hewlett-Packard.

Another popular calculator watch was the Time Computer Calculator 901, which could perform basic arithmetic functions. The 902 models had additional functions such as percentage calculations. The Time watches carried a high price tag (US$4,000) because they were made of solid gold and operated by a stylus pen owing to the small size of their buttons.[4]

Popular watches include those from Seiko and Citizen, some of which had innovative functions.

Japanese electronics company Casio produced the widest variety of watches. In the mid-1980s, Casio created the Databank calculator watch, which performed calculator functions and stored appointments, names, addresses, and phone numbers. The calculator watches made by Casio earned much fame due to their appearance in movies and also due to being celebrities' choice during public events.

Mass-produced calculator watches appeared in the early 1980s, with the most being produced in the middle of the decade. Their popularity began to fade in the mid-1990s with the introduction of cheaper mobile phones and PDAs, which could perform the same functions. The calculator watch is now a collector's item, and notable watches such as the Timex watches and some special variants of Casio calculator watches such as the CFX-400 command a high premium in the used market.[4]

## See also

* Nelsonic game watch
* Smartwatch

## References

1. ↑ "Going Digital". Time (magazine). December 22, 1975. http://www.time.com/time/magazine/article/0,9171,879586,00.html.
2. ↑ "Gegcalculators.com". https://gegcalculators.com/.
3. ↑ "History of LEDs - Chapter 1". http://www.ecse.rpi.edu/~schubert/Light-Emitting-Diodes-dot-org/chap01/chap01.htm.
4. ↑ 4.0 4.1 Baguley, Richard (2013-09-20). "The Gadget We Miss: The Calculator Watch". Gizmodo Media Group. https://gizmodo.com/the-gadget-we-miss-the-calculator-watch-1344076812.

* ^ Collectors Guide to Pocket Calculators. by Guy Ball and Bruce Flamm, 1997, ISBN 1-888840-14-5 – includes an extensive history of early pocket calculators and highlights over 1,500 different models from the early 1970s, including several of the early calculator watches. The book is still in print.

## External links

* Programmable calculators \- Specifications and descriptions
* WATCH. History of the modern wrist watch. \- Section on calculator watches

* v
* t
* e

Computer sizes

Classes of computers

Microcomputer,
personal
computer|

| Stationary|

* Workstation
* Desktop
* Home
* Personal supercomputer
* Portable
* Tabletop
* Smart TV
* Interactive kiosk
* Game arcade cabinet
* System board
* Home console
* Microconsole
* SFF
* Nettop
* Plug
* Smart speaker

|

Mobile|

| Laptop|

* Desktop replacement
* 2-in-1
* Subnotebook
* Netbook
* Smartbook
* Ultrabook
* Ultra-mobile PC

|

Tablet|

* Ultra-mobile PC
* 2-in-1
* Phablet
* Tabletop

Handheld|

* Handheld PC
* Palmtop PC
* Pocket computer
* PDA
* Electronic organizer
* Mobile phone
* Feature phone
* Smartphone
* Phablet
* PMP
* E-reader
* Handheld game console
* Portable/Mobile data terminal

Calculator|

* Scientific
* Programmable
* Graphing

Wearable|

* Digital wristwatch
* Calculator watch
* Smartwatch
* Smartglasses
* Smart ring

Midrange|

* Server
* Minicomputer
* Supermini

Large|

* Super
* Mainframe
* Minisuper

Others|

* Microcontroller
* Nanocomputer
* Single-board computer
* Smartdust
* Wireless sensor network

* v
* t
* e

Smartwatch

* Wearable computer
* Calculator watch

Wrist computer|

| Android|

* i'm Watch
* Motorola Motoactv
* Samsung Galaxy Gear
* WIMM One
* ZGPAX s5
* Omate TrueSmart
* Neptune Pine

|

watchOS|

* Apple Watch
* Series 1
* Series 2
* Series 3
* Series 4
* Series 5

Wear OS|

* Asus ZenWatch
* Asus ZenWatch 2
* Asus ZenWatch 3
* Casio WSD-F10
* Casio WSD-F20
* Huawei Watch
* LG G Watch
* LG G Watch R
* LG Watch Urbane
* LG Watch Urbane 2nd Edition
* LG Watch Sport
* LG Watch Style
* Michael Kors Access
* Moto 360
* 1st generation
* 2nd generation
* Moto 360 Sport
* Fossil Q Founder
* Fossil Q Marshal
* Fossil Q Wander
* Nixon Mission
* Polar M600
* Samsung Gear Live
* Sony SmartWatch 3
* Tag Heuer Connected

Tizen|

* Samsung Galaxy Gear
* Samsung Gear 2
* Samsung Gear Fit
* Samsung Gear S
* Samsung Gear S2
* Samsung Gear S3

Fitbit OS|

* Fitbit Ionic
* Fitbit Versa

Others|

* Fossil Wrist PDA
* Ruputer
* ZYPAD
* MetaWatch
* Microsoft Band
* 2
* Pebble
* Pebble Time
* Qualcomm Toq
* Sony SmartWatch

Wrist communicators|

* Fashion S9110
* Hyundai MB 910
* LG GD910
* Martian Watches
* SWaP Classic
* Z1 Android Watch-Phone

Wrist data unit|

* Casio Databank
* Timex Datalink

Others|

* Casio G-Shock GB-6900
* Nelsonic Game Watch

Software|

* AsteroidOS
* Tizen
* WatchOS
* Wear OS

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