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The DEC
Digital Equipment Corporation

Digital Equipment Corporation was a pioneering United States company in the computer industry. It is often referred to within the computing industry as DEC ....
 PDP-7 is a minicomputer
Minicomputer

A minicomputer is a class of multi-user computers that lies in the middle range of the computing spectrum, in between the largest multi-user systems and the smallest single-user systems ....
 produced by Digital Equipment Corporation
Digital Equipment Corporation

Digital Equipment Corporation was a pioneering United States company in the computer industry. It is often referred to within the computing industry as DEC ....
. Introduced in 1965, the first to use their Flip-Chip
Flip Chip (trademark)

Flip-Chip modules were used in the Digital Equipment Corporation PDP-7 , PDP-8, PDP-9 and PDP-10, beginning on August 24, 1964.There appeared to be some confusion inside DEC at the time, as various manuals refer to it as "FLIP CHIP", "Flip Chip", "FLIP-CHIP", "Flip-Chip" and "Flip Chip", with trademark and registered trademark symbols....
 technology, with a cost of only $72,000 USD, it was cheap but powerful. The PDP-7 was the third of Digital's 18-bit machines, with essentially the same instruction set architecture as the PDP-4
Programmed Data Processor

Programmed Data Processor was the name of a series of minicomputers made by Digital Equipment Corporation. The name 'PDP' intentionally avoided the use of the term 'computer' because at the time of the first PDPs, computers had a reputation of being large, complicated, and expensive machines, and the venture capitalists behind Digital would...
 and the PDP-9
Programmed Data Processor

Programmed Data Processor was the name of a series of minicomputers made by Digital Equipment Corporation. The name 'PDP' intentionally avoided the use of the term 'computer' because at the time of the first PDPs, computers had a reputation of being large, complicated, and expensive machines, and the venture capitalists behind Digital would...
.






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Pdp7 Oslo 2005
The DEC
Digital Equipment Corporation

Digital Equipment Corporation was a pioneering United States company in the computer industry. It is often referred to within the computing industry as DEC ....
 PDP-7 is a minicomputer
Minicomputer

A minicomputer is a class of multi-user computers that lies in the middle range of the computing spectrum, in between the largest multi-user systems and the smallest single-user systems ....
 produced by Digital Equipment Corporation
Digital Equipment Corporation

Digital Equipment Corporation was a pioneering United States company in the computer industry. It is often referred to within the computing industry as DEC ....
. Introduced in 1965, the first to use their Flip-Chip
Flip Chip (trademark)

Flip-Chip modules were used in the Digital Equipment Corporation PDP-7 , PDP-8, PDP-9 and PDP-10, beginning on August 24, 1964.There appeared to be some confusion inside DEC at the time, as various manuals refer to it as "FLIP CHIP", "Flip Chip", "FLIP-CHIP", "Flip-Chip" and "Flip Chip", with trademark and registered trademark symbols....
 technology, with a cost of only $72,000 USD, it was cheap but powerful. The PDP-7 was the third of Digital's 18-bit machines, with essentially the same instruction set architecture as the PDP-4
Programmed Data Processor

Programmed Data Processor was the name of a series of minicomputers made by Digital Equipment Corporation. The name 'PDP' intentionally avoided the use of the term 'computer' because at the time of the first PDPs, computers had a reputation of being large, complicated, and expensive machines, and the venture capitalists behind Digital would...
 and the PDP-9
Programmed Data Processor

Programmed Data Processor was the name of a series of minicomputers made by Digital Equipment Corporation. The name 'PDP' intentionally avoided the use of the term 'computer' because at the time of the first PDPs, computers had a reputation of being large, complicated, and expensive machines, and the venture capitalists behind Digital would...
. It was the first wire-wrapped
Wire wrap

Wire wrap is a technique for constructing small numbers of complex electronics assemblies. It is an alternative technique to the use of small runs of printed circuit boards, and has the advantage of being easily changed for prototyping work....
 PDP.

In 1969, Ken Thompson wrote the first UNIX
Unix

Unix is a computer operating system originally developed in 1969 by a group of American Telephone & Telegraph employees at Bell Labs, including Ken Thompson , Dennis Ritchie, Douglas McIlroy, and Joe Ossanna....
 system in assembly language on a PDP-7, then named Unics as a somewhat treacherous pun on Multics
Multics

Multics was an extremely influential early time-sharing operating system. The project was started in 1964. The last known running Multics installation was shut down on October 30, 2000....
, as the operating system for , a game which required graphics to depict the motion of the planets. A PDP-7 was also the development system used during the development of MUMPS
MUMPS

MUMPS , or alternatively M, is a programming language created in the late 1960s, originally for use in the Health care. It was designed for the production of multi-user database-driven applications....
 at MGH
MGH

MGH is an abbreviation of:*Massachusetts General Hospital*Margate Airport, regional airport in Margate, KwaZulu-Natal, South Africa*Montreal General Hospital...
 in Boston a few years earlier.

There are a few remaining PDP-7 still in operable condition, along with one under restoration in Oslo
Oslo

is the Capital and largest List of cities in Norway in Norway.Metropolitan Oslo or the Greater Oslo Region makes up the third largest urban area in Scandinavia after Metropolitan Stockholm and Metropolitan Copenhagen....
, Norway.

External links

  • "The famous PDP-7 comes to the rescue" (Bell Labs' Unix history).
  • PDP-7 entry from Year 1964 in the DIGITAL Computing Timeline.
  • PDP-7 restoration project located in Oslo, Norway.
  • general information for the computer system.
  • information about the PDP-7 and PDP7A including some manuals and a customer list covering 99 of the 120 systems shipped.