AKA (Label): ELECTRONIC CALCULATOR, Product number (P/N): 121DM,
Keywords/Tags: 121DM
Date of intro: 1977, Origin: Japan (List), Dimensions: 245x190x60mm, Weight: 800g,
Power: AC,
Display: Type = Display (VFD) (List), Digits = 12+1,
Number of keys: 24, #Key-Black: 11, #Key-Brown: 5, #Key-Green: 4, #Key-Orange: 2, #Key-Red: 2,
Keyboard Array (Rows x Columns): 04x07, Keyboard Layout: [RV] [7] [8] [9] [x] [(Division)] [MT] - [C] [4] [5] [6] [(SquareRoot)] [%] [RM] - [CE] [1] [2] [3] [+=] [-=] [M-] - [0] [.] [M+],
Decimal switch: [A-2-F], Miscellaneous switch: [(ArrowUp)-K (ArrowUp)-(Sigma)],
Classification: / Desktop with Display,
Featuring: Procent, Square root, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Main Components: TEXAS INSTRUMENTS: TMS1273NL,
Resemblance with: (Resemblance 530),
Known Serial-numbers: 767891 (List of all S/Ns from BUSICOM)
Collector value: 7/10,