AKA: Scientist, Product number (P/N): 4520,
Keywords/Tags: 4520 | Scientist
Date of intro: ~1976, Origin: Hong Kong (List), Dimensions: 152x76x28mm, Weight: 190g,
Power: Rechargeable, Adaptor: NATIONAL SEMICONDUCTOR_adaptors: DC401,
Display: Type = Display (LED) (List), Digits = 10+1+(2+1),
Number of keys: 35,
Classification: / Pocket,
Featuring: Scientific functions, Square root, PI, Memories: 1,
Original Equipment Manufacturer : NATIONAL SEMICONDUCTOR: 4520 (List of all Export-OEM-models from NATIONAL SEMICONDUCTOR), Resemblance with: HIRADASTECHNIKA SZOVETKEZET: TK1518; NOVUS: 4520,
Collector value: 8/10,
Internet: Link-1: SMITHSONIAN MUSIC