As stated above, nearly every imprint, timeline and appearances in other media have its own separate universe. Most of these have been cataloged by Marvel Comics in many publications, being most notable the "Official Handbook of the Marvel Universe: Alternate Universes". The numerical designations for these are rarely revealed outside of reference works such as the "Official Handbook of the Marvel Universe: Alternate Universes 2005". A.R.M.O.R. and Project Pegasus however seem to possess vast knowledge of other Marvel realities, utilizing the same designations; whether this is simply narrative convenience on behalf of Marvel's authors or an unusual decision by these agencies to utilize an effectively alien catalog method is as yet unstated.