| Over The Top |
Laboratory |
OTT |
| operational test team |
Government |
OTT |
| Optional Team Targeting |
Space Science |
OTT |
| Ottumwa Terminal Railroad Company |
Regional Railroad |
OTT |
| Optical Topological Transition |
Physics Related |
OTT |
| Office of Transportation Technologies (Department of Energy) |
US Government |
OTT |
| Office of Transportation Technologies |
US Government |
OTT |
| Object To Test |
Computer Software |
OTT |
| one-time tape |
Government |
OTT |
| operator tactics trainer |
Government |
OTT |
| Office of Technology Transfer |
US Government |
OTT |
| operations team trainer |
Government |
OTT |
| Notingham VORTAC, Nottingham, Maryland USA |
Regional Airport Code |
OTT |
| One Time Text |
Medical |
OTT |
