Wikipedia is a collaboratively written encyclopedia. It’s a
wiki, which means that the underlying software (in this case, a
system called MediaWiki) tracks every change to every
page. That change-tracking system makes it easy to remove
(revert) inappropriate edits, and to identify repeat
offenders who can be blocked from future editing.
Wikipedia is run by the not-for-profit Wikimedia Foundation; that’s why you don’t see
advertising on any of its pages, or on any of Wikipedia’s sister projects
that the Foundation runs (more on those later). To date, almost all the
money to run Wikipedia and its smaller sister projects has come from
donations. Once a year or so, for about a month, you may see a fundraising
banner instead of the standard small-print request for donations at the
top of each page, but, so far, that’s about as intrusive as the
foundation’s fundraising gets.
The Foundation has only about a dozen employees, including a couple
of programmers. It buys hardware, designs and implements the core
software, and pays for the network bandwidth that makes Wikipedia and its
sister projects possible. But it doesn’t have the resources to do any of
the writing for those projects. All the writing
(known in the community as editing) is done by people
who get no money for their efforts, though plenty of personal
satisfaction.
Wikipedia is an encyclopedia that anyone can edit. You don’t have to
register to edit articles. If you do register, you don’t even have to
provide an email address (although you should, in case you forget your
password). Because of the variety and number of editors, Wikipedia is
immense in scope—2.3 million articles as of April 2008, and over 1 billion
words (more than 25 times as many as the next largest English-language
, the Encyclopaedia
Britannica). By the same token, Wikipedia is—and will continue to be—a
work in