H2G2 Content Usability
H2G2 - Hitchiker's Guide to the Galaxy, "an unconventional guide to life, the universe and everything". Inspired by Douglas Adam's novel of the same name, H2G2 (stated in 1999) predates and is somewhat similar to Wikipedia - both are encyclopedias jointly authored by visitors to a web site. For H2G2, the site is www.bbc.co.uk/h2g2/. Anyone can register on the site and contribute content to H2G2.
Usability 
