I'm sure that some of you have been annoyed when searching or using the index and found a hit, thinking it looks strange, only to realize that you are looking at a "Compact Edition" topic. This has happened to me more than once.
We just had a discussion about this in the MVP group and Umachandar Jayachandran (aka UC) have use this great tip.
Apparently we can remove collections from Books Online. If you use the index in Books Online and type "Help Coll", you will find and entry named "Help Collection [SQL Server]". Here you can remove "SQL Server 2005 Compact Edition", and later add it back in if you wish.