San Diego Archaeological Center - New meaning for OHP: Overhead Projector. We've had this vintage item for awhile. Available for a donation of $35. Yes, it works! Reminds me of high school
LCD Projector vs. Overhead Projector: Differences, Pros, and Cons - Pointer Clicker
A3 OHP Film Overhead Projector Film Clear for Laser Printer 420x297 - 50 Sheets 876169333279 | eBay
Aurora Overhead Projector OHP-285HS
Amazon.com : 100 Sheets Laser Transparency Film 8.5x11 Color Transparent Paper OHP Clear Overhead Projector Film 8.5x11" for Laser Jet Printer Copier Copy Copies Photo Transparent Film A4 Letter Size 100 Pack :
G LAB A4 Overhead Projector Office Presentations Teaching OHP Two lamps Deluxe frensel lens A4 size 1-4Mts Projection GERMAN Lenses for Better Quality : Amazon.in: Industrial & Scientific