The OED

The Oxford English Dictionary (OED) was structured as hypertext according to the same principles applied to Dilbert, including structural and semantic constructs in the wayfinding schema. The user interface, however, is quite different. The OED can be found on the web at http://www.oed.com/oed.html. A description is included in Nielsen [9], pp. 330-332). Highlights:

contains 569,000 cross references, many linking to variant forms of a word, to words with similar meaning, or to entries about prefixes or suffixes;

there are 2.4 million quotations to illustrate the way various authors have used words (showing broader context);

two principles of access were used to address distinct sizes of entries (e.g., 20% of the entries are smaller than 50 characters, while 5% of the entries are larger than 4,000 characters), the larger structured hierarchically according to meaning and submeaning;

the interface allows alternative displays of entries according to the user's task (e.g., need for linguistic evolution versus definition).

According to Nielsen, "We should also note that the OED is one of the few examples where hypertext is actually more readable than paper."