Some cars leave a paper trail; the GM P platform left a name and a place in GM (General Motors)'s list. What follows is what can be said with a source behind it.
The story
General Motors used the P-body or P platform designation to refer to two different vehicle lines:
1984–1988 mid-engined Pontiac Fiero 1996–2003 electric General Motors EV1, a.k.a. the BEV1 platform retroactively since the introduction of the BEV2 platform.
Its place in the line
Nearby in the GM (General Motors) catalogue sit the 1955 Chevrolet and the 1957 Chevrolet.