The HP 2100 is a series of 16-bit minicomputers that were produced by Hewlett-Packard (HP) from the mid-1960s to early 1990s. Tens of thousands of machines in the series were sold over its twenty-five year lifetime, making HP the fourth largest minicomputer vendor during the 1970s.
HP 2100A
HP 1000 E-Series minicomputer with a 9895A dual 8-inch "flexible disc memory" drives.
HP 2115A Computer pictured without its power supply.
HP 2100 computer (upper left), shown with two 7970 tape drives, 7900-series hard disk, 2748 paper tape reader and a 2767A impact printer. The separate front-panel switches and lights were replaced with light-up pushbuttons, which had a tendency to burn out.
A minicomputer, or colloquially mini, is a type of smaller general-purpose computer developed in the mid-1960s and sold at a much lower price than mainframe and mid-size computers from IBM and its direct competitors. In a 1970 survey, The New York Times suggested a consensus definition of a minicomputer as a machine costing less than US$25,000, with an input-output device such as a teleprinter and at least four thousand words of memory, that is capable of running programs in a higher level language, such as Fortran or BASIC.
Six different minicomputers (out of many more models) produced by the Digital Equipment Corporation (DEC) with the year of introduction in brackets: First row: PDP-1 (1959), PDP-7 (1964), PDP-8 (1965); second row: PDP-8/E (1970), PDP-11/70 (1975), PDP-15 (1970).
Data General Nova, serial number 1, on display at the Computer History Museum
Raytheon RDS 500 seismic processing system in Benghazi in 1978
Varian Data Machines system connected to analogue tape playback system in 1984
