CompUSA is a retailer and reseller of consumer electronics, technology products and computer services. Its headquarters are in Fountainbleau, unincorporated Miami-Dade County, Florida, near Miami.

CompUSA serves consumer retail, small-to-medium businesses, corporate, government, and education customers. Founded in 1984 as Soft Warehouse in Addison, Texas, a northern suburb of Dallas, by Errol Jacobson and Michael Henochowicz, the company began national expansion in 1985 with its first megastore opening in Atlanta, Georgia. Jacobson and Henochowicz led a team of young managers including Elizabeth Greenwood and Pat Wyckoff who were skilled in retail, distribution, logistics, service and merchandising. Managed by Greenwood, the first satellite office opened in Tampa, Florida. Greenwood and Wyckoff soon joined forces with Cheryl Stoddard to open the Atlanta, Georgia store. The concept was copied in Dallas, and spurred the debut of stores in Houston and Southern California. Others involved in the process included Jeff Deskin, Randy Kilmer, James Ross, Melanie Collins, Dewey Thoes. In 1991, under the direction of Chief Executive Officer Nathan P. Morton, the company's name was changed to CompUSA, and the company became publicly traded on the New York Stock Exchange. While under Morton's leadership, CompUSA grew to over $2 billion in revenues. Morton resigned in 1993 after a falling out with the board of directors.

CompUSA operates 23 retail stores in Florida, Texas, Illinois, Delaware, North Carolina, and Puerto Rico. Eleven former Tiger Direct locations and two new locations were brought under the CompUSA banner in the summer of 2008 for a total of 30 stores.

Until its reorganization, CompUSA, Inc. was a wholly-owned subsidiary of U.S. Commercial Corp S.A.B. de C.V. and indirectly controlled by a common shareholder, Carlos Slim. On December 7, 2007, an affiliate of liquidation firm Gordon Brothers Group bought the company. Systemax purchased the CompUSA brand, 16 retail locations and other company assets in January, 2008.

Systemax also operates CompUSA.com, a retail web site that offers an assortment of products, as well as a dedicated catalog site for businesses.