One free online dictionary of computer terminology is the Tech Terms Computer Dictionary at TechTerms.com, as of 2015. An IT professional with a degree in computer science founded the site in 2005 and wrote all definitions. WhatIs.com, founded in the 1990s, is another, now owned by the company TechTarget.
Users can browse both the TechTerms.com dictionary and WhatIs.com alphabetically or by topic or category, or they can search them for specific definitions. TechTerms.com also offers a random term generator, daily definition feature, and daily quiz question. WhatIs.com features a reference library with cheat sheets, learning guides and links to quizzes and other TechTarget technology sites. In addition to its own word of the day and "test yourself" features, WhatIs.com has a "buzzword alert" on its home page.