All GM divisions had them. These were kept at dealers in 3 ring binders loose leaf, or some bound with hundreds of pages in the later volumes. Pretty much a paper version of the old parts files on microfiche. For the Fiero they have one for each year but they are add on books. First book 84 only, one that does 84-85, 84-86, 84-87 and the last covers 84-88.