A great concept/project started in 1985 by Denis Howe, the Free On-Line Dictionary of Computing (FOLDOC) now contains some 7900+ entires. It is a browsable and searchable dictionary of "acronyms, programming languages, tools, architectures, operating systems, networking, theory, mathematics, telecoms, institutions, companies, projects, products, history..." and etc. Definitions are voluntarily contributed by users and filtered through the editor. Following a search, the list of terms alphabetically nearest to the search pattern are displayed along with any cross-references--a bonus for the spelling-challenged user. Several mirror sites are provided.