divinyls, although i seemed to have misplaced it...
whats a 'long box'?
CD's use to come in cardboard boxes the same width and double the length of the actual jewel case. Environmentalists (including R.E.M.) opposed this but the record industry insisted on using it to help curb theft. A couple of CD's were released in a specialized cardboard package (INXS's "Welcome to Wherever You Are" comes to mind) that were left opened and shrinkwrapped to mimic the longbox on the rack, but folded up into the size of a jewel case when unwrapped.
They were eventually done away with in the early 90's. They were usually pointless and wasteful, I agree, but the longbox also served it's purpose (e.g. - the "cutouts" for Sgt. Pepper's Lonely Heart's Club Band album originally found in the vinyl gatefold version were on the back of the longbox).
I used to actually save my longboxes and used them as school locker decoration.
BTW my first CD gift was Pink Floyd's "The Wall". My first two CD purchases were Nirvana's "Nevermind" and They Might Be Giant's "Flood". All came in longboxes. As you can tell, I got my first CD player in 1991 (I was 15).
(Justin Z beat me to the explanation).
(EDIT: I learned more about the reasoning behind the longbox, assuming this info is accurate
http://en.wikipedia.org/wiki/Longbox)