The online version (for a subscription fee) of the 20-volume Oxford
English Dictionary (OED) was launched in March 2000 by the Oxford
University Press (OUP). Since then, the website has offered a quarterly
update of the online dictionary, with around 1,000 new or revised
entries each time. In March 2002, two years after this first
experience, the Oxford University Press launched Oxford Reference
Online (ORO), a comprehensive encyclopedia designed directly for the
web, and also available for a subscription fee. Its 60,000 webpages and
one million entries could represent the equivalent of 100 print
encyclopedias.