Quarterdeck Office Systems

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Quarterdeck Office Systems
Fate Acquired by Symantec
Successor Symantec
Founded 1982
Defunct 1998
Headquarters Marina del Rey, California
United States
Products Quarterdeck Expanded Memory Manager, DESQview, DESQview/X,

Quarterdeck Office Systems, later Quarterdeck Corporation (NASDAQ: QDEK), was an American computer software company. It was founded by Therese Myers[1][2] and Gary Pope in 1981[3] and incorporated in 1982. Their offices were initially located at 150 Pico Boulevard in Santa Monica, California and later at 13160 Mindanao Way in Marina del Rey, California, as well as a sales and technical support unit located in Clearwater, Florida. In the 1990s, they had a European office in Dublin, Ireland. Their most famous products were the Quarterdeck Expanded Memory Manager, DESQview, CleanSweep, DESQview/X, Quarterdeck Mosaic, Manifest and Partition-It.[4]

On April 18, 1989, Quarterdeck was awarded a US software patent that allowed multiple windowed PC applications under MS-DOS.[5]

Quarterdeck undertook a number of acquisitions in the 1990s, leading ultimately to its failure in 1998 due to the collapse of the market for MS-DOS-based utilities.

In 1995, the company acquired Landmark Research International Corp. for 3.5 million shares of Quarterdeck (acquiring MagnaRAM and WinProbe)[6] and then Inset Systems, Inc. of Brookfield, Connecticut in September of that year for 933,000 shares of Quarterdeck (acquiring HiJaak graphics software in the deal).[7]

In 1997, Quarterdeck acquired Datastorm Technologies, Inc., publishers of PROCOMM and PROCOMM PLUS, and relocated its technical support and development operations from California and Florida, to Datastorm's Columbia, Missouri headquarters.

In 1998, with DOS utilities market all but collapsed, Quarterdeck was acquired by Symantec (the Norton Utilities company), which discontinued support of some Quarterdeck products, e.g., Mosaic, and integrated others into larger offerings, e.g., CleanSweep, which became part of Norton SystemWorks.[8]

List of software products[edit]


  1. ^ Board of Trustees - Boston College
  2. ^ Our Team - InfraTab
  3. ^ Larson, Jennifer (1993). "Quarterdeck Is Changing The Office Environment". General Computing 4 (8). 
  4. ^ Divvying up Disks PC Mag, 25. März 1997, S. 66
  5. ^ Patent Is Won By Quarterdeck - NY Times
  6. ^ PR Newswire, June 30, 1995. "Quarterdeck Acquires Landmark Research International"
  7. ^ PR Newswire, September 06, 1995. "Quarterdeck Signs Agreement to Acquire Inset Systems, Inc.; Inset Shipped This Week a Complete Graphic Utilities Solution for Windows 95".
  8. ^ Symantec Press Release
  9. ^ Quarterdeck Mosaic screen shots

External links[edit]