| Acronym | Meaning |
![](file.png) | OSP | Operations Support Plan |
![](file.png) | OSR | Operations Support Room |
![](file.png) | OSS | OEX SuPport System |
![](file.png) | OSS | Office Of Space Science |
![](file.png) | OSS | OPtics Subsystems |
![](file.png) | OSS | Orbiting Space Station |
![](file.png) | OSSA | Office Of Space Science And Applications |
![](file.png) | OSSRH | Orbiter Subsystem(s) Requirements Handbook |
![](file.png) | OST | Operations Support Team (GSFC) |
![](file.png) | OST | Orbiter SuPport Trolley |
![](file.png) | OSTA | Office Of Space And Terrestrial Application(s) |
![](file.png) | OSTDS | Office Of Space Tracking And Data Systems |
![](file.png) | OSTO | Office Of Space Transportation Operations |
![](file.png) | OSTP | Orbiting System Test Plan |
![](file.png) | OSTS | Office Of Space Transportation Systems |
![](file.png) | OT | Operating Time |
![](file.png) | OT | Operational Instrumentation MDM-Tank |
![](file.png) | OT | Operational Test |
![](file.png) | OT | Operational Trajectory |
![](file.png) | OT | Optical Tracker |
![](file.png) | OT | Out Temperature |
![](file.png) | OT | Overti Me |
![](file.png) | OT&E | Operational Test And Evaluation |
![](file.png) | OTA | Optical Telescope Assembly |
![](file.png) | OTB | Orbiting Tanker Base |
![](file.png) | OTBD | Outboard |
![](file.png) | OTC | Orbiter Test Conductor |
![](file.png) | OTD | Operational Technical Documentation |
![](file.png) | OTD | Orbiter Test Director |
![](file.png) | OTDA | Office Of Tracking And Data Acquisition (now OSTDS) |
![](file.png) | OTEMP | Overtemperature |
![](file.png) | OTH | Over-the-Horizon (.Radar) |
![](file.png) | OTK | Oxidizer Tank |
![](file.png) | OTL | Ordnance Test Laboratory |
![](file.png) | OTLC | Orbiter Timeline Constraints |
![](file.png) | OTO | One-Time-Only |
![](file.png) | OTOS | Orbit-to-Orbit Stage |
![](file.png) | OTP | OPerational Test Procedure |
![](file.png) | OTP | Operations Test Plan |
![](file.png) | OTP | Operations Turnaround Plan |
![](file.png) | OTR | Operating Time Record |
![](file.png) | OTR | Outer |
![](file.png) | OTS | Off-the-Shelf |
![](file.png) | OTS | Orbiter Test Conductor |
![](file.png) | OTT | Optional Team Targeting |
![](file.png) | OTV | Operational Television |
![](file.png) | OTV | Orbital Transfer Vehicle |
![](file.png) | OTV | Orbiter Transfer Vehicle |
![](file.png) | OTY | Quantity |
![](file.png) | OUI | Quito |