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Busicom 141 Desktop Calculator

NCM/Busicom 141

The Busicom 141 was a follow-on to Nippon Calculating Machine Co., Ltd.'s first marketed desktop electronic calculator, the Busicom 161. The 141 was a somewhat stripped-down version of the 161, providing 14 digits of capacity versus 16 of the 161, and omitting the square root function. The claim to fame for the 141 was that it was essenially a re-implementation of the Busicom 161 using small-scale DTL integrated circuits provided by US chipmaker Fairchild. The 141 was not completely IC-based, as it still used a small magnetic core memory array for working register storage, and it still contained a significant number of discrete components. The calculator operates with fixed decimal point for all operations, selected at 0, 1, 2, 3, 6 or 8 digits behind the decimal point. Like the 161, the machine provides a 'backspace' feature for error correction, along with true credit balance.
NCM/Busicom 141 Specifications

Manufacturer: Nippon Calculating Machine Co., Ltd.
Model Number: 141
Manufactured In: Japan
Date of Introduction: November, 1967
Display Technology: Nixie Tube, 14 Digits
Logic Technology: Early Fairchild DTuL Small Scale ICs
256-bit Magnetic Core Memory array for working register storage
Digits of Capacity: 14
Decimal Modes: Rotary switch selectable fixed decimal at 0, 1, 2, 3, 6 or 8 digits behind the decimal
Math Functions: Four Function
Memories: One accumulator-style memory register
Performance: Addition/Subtraction: 50ms; Multiplication/Division/Square Root: 300-800ms (Mfg. Claims)
Size: 17 3/8" wide, 18 1/2" deep, 9 1/2" high
Weight: 33 pounds

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