In most Production Music Libraries you can find songs that have Full and Reduced version.  For those new to the industry they may not know what the difference is between a Full and Reduced version.

Full Version: This is the complete or “Full” original version of the song with all the original instruments and parts played in their entirety.  It is important to note that a song can have various lengths and they can still all be Full Versions of the song.

Reduced Version: This is the Full Version minus one or more of the following; main instrument, specific instrument, specific melody or a specific beat.  By removing one of the preceding elements from a song it becomes a Reduced Version of it’s original Full version.  Just like in Full Versions, Reduced Version can also have various lengths.