Append the same user-entered text to the beginning or ending of the existing text in the chosen tag (Song Name, Artist, Album Artist, Album, Composer, Comments, Genre, Grouping or Show Name, and their Sort siblings) in each selected track.
For tags other than "Song Name" and "Show Name", this script may be just slightly less involved than performing a multi-edit on the selected tracks
Also see This Tag, That Tag Scripts.
Preview each track as it will appear after applying the entered text.
Batch merge and/or delete playlists
Remove iTunes tracks disassociated from files
Create text file listing tracks common to and exclusive to two playlists
Add or subtract a user-entered number from each selected track's Plays
App displays files in iTunes Music folder which are not in iTunes library
Copy chosen tag info from one set of tracks to a different set of tracks