If you have an interest in Polaroid as cultural phenomena, technological wonder or artistic abstraction, seek out articles or related book on the subject by Peter Buse. Peter is the Dean of the School of the Arts at the University of Liverpool. His page there lists some of his committed work on the vast subject that is Polaroid photography. And elsewhere, as published in Sage Journals, from the perspective of an artist, I found his article, The Polaroid Image as Photo-Object, incisive as to what is or was this thing, Polariod.

https://liverpool.academia.edu/PeterBuse