Seth does a rather good job of explaining knowledge management to us, in two articles (more coming!) on the subject.
Knowledge management is an attempt to do with the collective knowledge of an organization — the individuals within the organization — what an individual does with his own knowledge. That includes storing, cross-linking, categorizing, contextualizing, retrieving, and of course presenting.
KM requires computer technology, because it can’t be done any other way. Remember, this isn’t the knowledge of a single individual being available to that individual whenver its needed, we’re talking about the knowledge of at least one individual being usable by at least one.