Jeep NP208 is 23 spline input, driver's drop and fixed yoke outputs.
Chev NP208 is RH drop (except a few 88-90 with the IFS before the 242 was used) and slipyoke output. They came with 27 and 32 spline inputs (there are rumoured 21/23 spline ones for the 2.8 and 4.3 V6s, but no-one has shown me one yet)
Ford also used the NP208 (driver's side drop, 31 spline input and fixed yoke on Broncos or slip yoke in pickups. Wider than the other ones and it uses a longer chain with bigger drive gears)
Dodge NP208 (Pass side drop, 23 spline input. Fixed or slip yoke style. Mirror image to the Jeep one) bolts directly to Jeep 727 for RH drop swaps. (as does the D300)