Although mechanical examples
of computers have existed through much
of recorded human history, the first
electronic computers were developed in
the mid-20th century (1940 - 1945).
These were the size of a large room,
consuming as much power as several
hundred modern personal computers
(PCs). Modern computers based on
integrated circuits are millions to
billions of times more capable than the
early machines, and occupy a fraction
of the space.
Computers Directory: Directories (257)
Generally, a directory, as used in computing and telephony, refers to a repository or database of information which is heavily optimised for reading, under the assumption that data updates are very rare compared to data reads. Commonly, a directory supports search and browsing in addition to simple lookups.
A website which offer access to a categorized listing of other websites optimized for lookup, search, or browsing is a directory, a web directory. The Open Directory Project is an example of a web directory.
