Advanced Micro Devices (AMD) is a manufacturer of integrated circuits. Like its chief competitor, Intel, it is a Fortune 500 company. Most personal computers and many computer servers have AMD or Intel processors as their "brain", along with various supporting integrating circuits.
The AMD line of processors is more diverse than Intel's current Pentium microprocessor. It tends to divide them by computing capability and electrical power, although they run an instruction set largely compatible with the main Intel line; Microsoft Windows and its successor, as well as many Linux-family operating systems, run on both.