Product number (P/N): 600,
Keywords/Tags: 600
Date of intro: ~1975, Origin: USA (List), Dimensions: 127x70x25mm, Weight: 75g,
Power: 9V + Adaptor,
Display: Type = Display (LED) (List), Digits = 6,
Number of keys: 15, #Key-Black: 15,
Keyboard Array (Rows x Columns): 04x04, Keyboard Layout: [7] [8] [9] [(Division)] - [4] [5] [6] [x] - [1] [2] [3] [-] - [C] [0] [+],
Decimal switch: [DECIMAL-(Blank)], Miscellaneous switch: [(Blank)-POWER],
Classification: / Pocket / RPN (Reverse Polish Notation),
Featuring: Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Serie-members: NATIONAL SEMICONDUCTOR: 600 (version-1) (Brown label); NATIONAL SEMICONDUCTOR: 600 (version-2) (Blue label); NATIONAL SEMICONDUCTOR: 600 (version-3) (Blue label + Blue keys); NATIONAL SEMICONDUCTOR: 600 (version-4) (Magenta label); NATIONAL SEMICONDUCTOR: 600 (version-5) ('WhizKid'-label); NATIONAL SEMICONDUCTOR: 600 (version-6) (Red case),
Known Serial-numbers: 261716 | 279263 | 299898 | 522642 | 546635 (List of all S/Ns from NATIONAL SEMICONDUCTOR)
Initial Cost Price: USD29.95, Collector value: 7.5/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Internet: Link-1: SMITHSONIAN MUSIC