Nippon Computing Machine Co. (NCM) Busicom 202 Desktop Calculator
Nippon Calculating Machine Co. (NCM) Busicom 202
The Busicom 202 was the first machine designed under contract by
Wyle Laboratories for Nippon Calculating Machine Co. To
learn more information about Wyle Laboratories and its successor,
Computer Design Corp. see the essay on this site entitled
"The History of
Compucorp". The Busicom 202 was introduced November of 1967, at
the same time that NCM announced it's own in-house designed and
manufactured machines, the Busicom 141 and 162. The design of the 202
was a follow-on design from the
Wyle Labs WS-02 electronic
calculator, utilizing small scale DTL (Diode-Transistor Logic) integrated
circuits, and a small CRT display which displays the status of the
three working registers of the machine and its two memory storage registers.
The machine provides a built-in punched card reader that (bi-directionally)
reads cards that are connected together end-to-end to provide programs
in length that is limited only by how many cards can be
managed. Each punched card holds up to 36 program steps. The machine has
a capacity of 20 digits, with thumbwheel-selectable fixed decimal point
positions. Operating register storage is via a magnetostrictive delay line.
An optional external printer can be connected to provide permanent record
of calculations. NCM also marketed Wyle Labs-designed follow-on machines
called the Busicom 207 (with seven memory registers) and the
Busicom 2017 (seventeen
Busicom 202 Specifications
||Nippon Calculating Machine Co.
||CRT Display, Five 20-digit register display
||DTL Integrated Circuits, Magnetostrictive Delay Line
|Digits of Capacity:
||Thumbwheel selectable, fixed decimal location
||Four Function plus square root
||17 1/2" wide, 19" deep, 8 1/4" high.
||Programmable via Punched Card reader
||Supports optional external printer
Copyright ©1997-2021, Rick Bensene.