Just to add a couple that aren't on the list:
SRM refers to Shadowrun Missions, the ongoing Living Campaign that's available as PDF releases. They're usually denoted by two numbers, the first is the Season, the second is the actual adventure number. So SRM 04-01, which just released, is the "first" adventure in Season 4. (THere's actually an 04-00 which sets up the season as well).
CMP refers to Convention Mission Pack, which are Missions not tied to the regular season or the seasonal plotlines. These are convention exclusive adventures that are run at gaming conventions throughout the year. They're also denoted by two numbers, the first is the year the CMP was released, and the second the actual adventure number. So CMP 2010-02 is the second adventure done for the 2010 convention season.
Bull