Fast forward to now, and we live in the world of paperless cockpits and electronic flight bags, so the whole concept of a paper OFP may be anachronistic. Data was expensive those days, and printers weren't very robust - just simple characters, often dot matrix, on fan-folded perforated paper.

If you've been around airline ops for long, you'll have noticed that most OFPs look like they are stuck in the 1960's in terms of layout. Also, I guess you could use it for any other aircraft, but that would be at your own risk.) (Specifically, it is optimized for the PSX simulator, but you could use it with any other platform. Just for fun, here is an OFP template for PFPX that is optimized for the 747-400.