ACP means Automatic Colt Pistol. 32 Auto is what most folks call it. WCF means Winchester Center Fire. It's actually a rifle cartridge that people started chambering in pistols.
If you save this picture to your computer (right click, "save image as"), you can blow it up to really see the differences.
#3 is a 32 S&W. Probably what you meant by 32 Short.
#32 is a 32 S&W Long.
#6 is a 32 ACP. 32 Automatic. Right next to a 22 Long Rifle, for size comparison.
#26 is the 9mm Luger.
#70 is the 32 Winchester Center Fire, also called 32/20. Notice it's quite a bit longer than the other 32s.
Meddle not in the affairs of dragons, for thou art crunchy, and taste good with catsup - George of Lod, Year of Our Lord 297
I always take precautions.
Beware the Evil Bullet Fairies.