OPT
OPT is an abbreviation for:
- Online personalization of terminals
 - Operational Test - a test procedure from software development in which the operation of software on the productive system (e.g. live server) is tested. See also system test
 - Optimized Production Technology - a process from production logistics
 - Optional practical training
 - Optical projection tomography
 - Outward Processing Trade - a re-import procedure for semi-finished products
 - Orthopantomography - a panoramic image of the entire jaw area
 
Opt stands for:
- "Eye" or "Blick" in Greek, see list of Greek word stems in German foreign words
 - K-Opt Heuristics , a class of algorithms for approximating the problem of the traveling salesman
 - Opt-in , a procedure from permission marketing
 - Opt-out , a procedure from permission marketing
 - / opt , a system directory of Unix-like operating systems based on the file system hierarchy standard