A MOS Technology 6502 processor in a DIP-40 plastic package. The four-digit date code indicates it was made in the 45th week (November) of 1985.
Walther WSR-16 mechanical calculator. The row of digit-wheels in the carriage (at the front), is the Accumulator.
Motorola 6800 demonstration board built by Chuck Peddle and John Buchanan in 1974
Front panel of an IBM 701 computer with lights displaying the accumulator and other registers
A 1973 MOS Technology advertisement highlighting their custom integrated circuit capabilities
MOS Technology MCS6501, in white ceramic package, made in late August 1975
Introductory advertisement for the MOS Technology MCS6501 and MCS6502 microprocessors
MOS Technology MCS6502, in white ceramic package, manufactured in late 1975
The May 1976 datasheet omitted the 6501 microprocessor that was in the [[:File:MCS650X Datasheet Aug 1975 cover.jpg|August 1975]] version.
6502 processor die. The regular section at the top is the instruction decoding ROM, the seemingly random section in the center is the control logic, and at the bottom are the registers (right) and the ALU (left). The data bus connections are along the lower right, and the address bus along the bottom and lower left.
6502 pin configuration (40-pin DIP)
6502 processor die with drawn in NMOS-transistors and labels hinting at the functionality of the 6502's components
Acorn Atom
Acorn Electron
Apple I
Apple II
Apple IIe
Atari 2600
Atari 5200
Atari 7800
Atari 800
Atari Lynx
BBC Master
BBC Micro
Commodore PET
Commodore VIC-20
Commodore 64
Commodore 128
Family Computer (Famicom)
Nintendo Entertainment System
Ohio Scientific Challenger 4P
Orao
Oric-1
Oric Atmos
Tamagotchi digital pet<ref>{{cite web|url=https://www.kwartzlab.ca/2013/05/code-execution-tamagotchi/|title=Code Execution on a Tamagotchi|date=7 May 2013|website=kwartzlab.ca|access-date=2018-12-23|archive-url=https://web.archive.org/web/20180831185727/https://www.kwartzlab.ca/2013/05/code-execution-tamagotchi/|archive-date=2018-08-31|url-status=dead}}</ref>
TurboGrafx-16
Commodore 64

Then as mainframe systems gave way to microcomputers, accumulator architectures were again popular with the MOS 6502 being a notable example.

- Accumulator (computing)

To start with, one of the two accumulators was removed.

- MOS Technology 6502
A MOS Technology 6502 processor in a DIP-40 plastic package. The four-digit date code indicates it was made in the 45th week (November) of 1985.

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