Rapidman 804 calculator

Rapidman 804 calculator

hardware: electronic calculator

Rapidman 804 electronic hand-held calculator manufactured by Rapid Data Systems & Equipment Ltd. of Toronto in the early 1970s (released in 1973).

Basic Specifications:

• numeric capacity: 8-digit display with constant
• calculation functions: 4 basic operations (+, -, x, ÷), mixed calculations, chain division and multiplication, constant calculations in all four basic functions
• decimal system: full floating mode or selectable (0-7) from keyboard
• indicators: negative sign, and overflow (entry, answer)
  
  

Hardware specification:

• registers: two (1 numeric and 1 constant)
• CPU: MOS,single chip
• power supply: 9V bettery or AC adapter

Rapid Data Systems & Equipment Ltd.

1970s