The MAPS (Microprogrammable Arithmetic Processor System) or National MM570X was a system made of 5 discrete chips designed by National Semiconductor that can be programmed to operate in binary or BCD up to a 76 bit one cycle data word. The chipset was marketed as a general purpose serial data microcomputer system and was introduced in late 1971.

MM5700CA/D

National Semiconductor MM5700CA D Microprocessor
MM5703CC/D

National Semiconductor MM5703 Control ROM (extension) 2
MM5704CB/D

National SemiconductorMM5704 Keyboard interface unit
MM5703CB/D

National Semiconductor MM5703 Control ROM (extension) 3
MM5703CA/D

National Semiconductor MM5703 Control ROM (extension)
MM5702CA/D

National Semiconductor MM5702 Clock and Control Unit
MM5701CB/D

National Semiconductor MM5701 Register unit 1
MM5701

National Semiconductor MM5701 Register unit
Various old ex-USSR chips

K5ЯП 011001

K5??011001
K5ИЛ 011

K5??011
K5ЖЛ 012

K5??012
K5TK011

K5TK011
The set of 4 Rockwell LSI circuits used in

Sharp EL-8 The First Portable Electronic Calculator

NRD2256

NRD2256
DC2266

DC2266
AU2271

AU2271
AC2261

AC2261
The set of 4 SANYO LSI circuits used in Sanyo ICC-0081 "Mini Calculator"

This was one of the first hand-held calculators, being launched in Japan in spring 1970

LM8005A
LM8002E
LM8003F
LM8001E
The set of 3 TEXAS INSTRUMENTS LSI circuits used in Canon Pocketronic calculator, the first "handheld" battery-powered printing electronic calculator.

The Pocketronic was also one of the earliest calculators to use Large Scale Integrated (LSI) Circuits. No display, printout on thermal paper tape. A total of three LSI circuits made by Texas Instruments was necessary to do the four basic calculations with numbers of 6 to 12 digits.

TMC1732BJC
TMC1732AJC
TMC1731AJC
TMC1731A JC
TMC1730AJC
TMC1730A
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