AKA: MARK 20, SCIENTIFIC CALCULATOR, Product number (P/N): 20,
Keywords/Tags: 20 | SCIENTIFIC CALCULATOR
Date of intro: ~1975,
Display: Type = Display (VFD) (List),
Number of keys: 26, #Key-Black: 13, #Key-Red: 6, #Key-White: 7,
Keyboard Array (Rows x Columns): 06x05,
Miscellaneous switch: [DEG-RAD POWER_ON-(Blank)],
Classification: / Pocket,
Featuring: Scientific functions, Square root, PI, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Serie-members: APF: 20 (version-1) (LED-display); APF: 20 (version-2) (VFD-display),
Collector value: 7/10,