For the ITIL officianado's (?) here is Exin's (One of Two ITIL Examination Boards) update guide to ITIL based terminology.
It's a little dated, but it's still relevant and important to grasp before we go into 2006's ITIL "refresh" that we appreciate where ITIL has come from to date.
In particular it highlights the hard work that the itSMF, the OGC and the hundreds of reviewers have to go through to ensure quality and completeness.
This guide will also be useful for Exam candidates as a glossary of terms.
Exin's ITIL Update Guide...