WhereIsAtlas · Tech

Digital Equipment Corporation

The maker of the PDP and VAX minicomputers that helped create the computing industry — bought by Compaq in 1998

Defunct — Digital Equipment Corporation (DEC) was one of the most important computer companies of the 20th century, built on the PDP and VAX minicomputers. After decades as a computing giant it faltered in the 1990s and was acquired by Compaq in 1998, effectively ending the company.

Digital Equipment Corporation was founded in 1957 in Maynard, Massachusetts, by Ken Olsen and others who had worked on early computers. It is best known for the PDP series and the hugely successful VAX line of minicomputers, which made computing accessible to labs, universities and businesses rather than only huge corporations.

At its peak DEC was one of the largest computer companies in the world and a defining force in the industry, second only to IBM in the minds of many. Its engineers and runaway products helped launch entire ecosystems, and it was a training ground for generations of technologists.

But DEC missed the shift to personal computers and open systems, and by the 1990s its fortunes had fallen. It was acquired by Compaq in 1998 in a deal worth roughly $9.6 billion, and later Compaq itself was bought by HP. The Digital Equipment name disappeared as an independent company.

Quick facts

Founded
1957, Maynard, Massachusetts
Signature products
PDP and VAX minicomputers
Peak
Second-largest computer maker in the world
Acquired
By Compaq in 1998
Later
Compaq absorbed by HP in 2002
Legacy
Pioneer of the minicomputer era

Lineage — where the name went

From a 1957 Massachusetts minicomputer maker to Compaq and then HP — the ownership chain that still carries DEC's products, with Compaq marked as a sibling entry in this registry.

  1. 1957 — Ken Olsen founded Digital Equipment Corporation (with Harlan Anderson)
  2. 1957 — Harlan Anderson founded Digital Equipment Corporation (co-founder, from MIT Lincoln Laboratory)
  3. 1965 — Digital Equipment Corporation created PDP-8 (the minicomputer that created the market)
  4. 1970 — Digital Equipment Corporation created PDP-11 (the 16-bit machine that became the industry leader)
  5. 1977 — Digital Equipment Corporation created VAX (VAX-11/780, announced October 1977)
  6. 1992 — Digital Equipment Corporation created DEC Alpha (the 64-bit line built to succeed VAX)
  7. 1995 — Digital Equipment Corporation created AltaVista (a research-lab search engine, one of the first comprehensive ones)
  8. 1998 — Intel acquired Digital Equipment Corporation (bought DEC's compiler business and Hudson fab, not the company itself, under the Alpha patent settlement)
  9. 1998 — Compaq acquired Digital Equipment Corporation (announced 26 January 1998 at about $9.6 billion, closed in June; the largest computer merger to that date)
  10. 1999 — Compaq sold AltaVista (spun out after the Compaq purchase and later bought by Yahoo)
  11. 2002 — Compaq merged into Hewlett-Packard (HP's purchase of Compaq; former DEC products continued under HP logos)

Entities in this tree: Digital Equipment Corporation (company, 1957); Ken Olsen (person); Harlan Anderson (person); PDP-8 (product, 1965); PDP-11 (product, 1970); VAX (product, 1977); DEC Alpha (product, 1992); AltaVista (company, 1995); Intel (company); Compaq (company, 1982); Hewlett-Packard (company)

Sources

  1. Digital Equipment Corporation - Wikipedia — Wikipedia (2026-09-05)
  2. Compaq to buy Digital for $9.6B — ZDNet (2026-09-05)

Related: altavista · sun microsystems