Product number (P/N): 4640,
Keywords/Tags: 4640
Date of intro: 1976, Origin: Malaysia (List), USA (List), Dimensions: 160x82x36mm,
Power: Rechargeable,
Display: Type = Display (LED) (List), Digits = 10+1+(2+1),
Number of keys: 36, #Key-Black: 4, #Key-Grey: 1, #Key-White: 13, #Key-Yellow: 18,
Classification: / Pocket / RPN (Reverse Polish Notation),
Featuring: Scientific functions, Procent, Square root, Logic-technology: LSI (Large Scale Integration), calculator-chipset,
Related with: NATIONAL SEMICONDUCTOR_docu: 102035A (Instr.) 4640,
Main Components: NATIONAL SEMICONDUCTOR: DS8664N; NATIONAL SEMICONDUCTOR: MM5781DP?; NATIONAL SEMICONDUCTOR: MM5782N,
Other components: NATIONAL SEMICONDUCTOR: DS8867N,
Original Equipment Manufacturer : NATIONAL SEMICONDUCTOR: 4640 (version-1) (List of all Export-OEM-models from NATIONAL SEMICONDUCTOR), Resemblance with: HIRADASTECHNIKA SZOVETKEZET: TK1024 (version-1),
Serie-members: NATIONAL SEMICONDUCTOR: 4640 (version-1) (No Red Key); NATIONAL SEMICONDUCTOR: 4640 (version-2) (One Red Key),
Known Serial-numbers: 073757 | 122087 (List of all S/Ns from NATIONAL SEMICONDUCTOR)
Collector value: 8/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Info: Version with no red keys
Internet: Link-1: LE RAYON DES CALCULATRICES