| Abbreviation | Definition |
|---|---|
| REACQ | Reacquisition |
| REB | Re-Entry Body |
| REBA | Rechargeable EVA BAttery Assembly |
| REC | Record (RCD preferred) |
| RECERT | Recertification |
| RECHG | Recharge |
| RECIP | Reciprocate |
| RECOG | Recognition |
| RECON | Remote Console |
| RECONFIG | Reconfiguration |
| RECONN | Reconnaisance |
| RECOV | Recovery |
| RECP | Receptacle |
| RECP | Request for Engineering Change Proposal |
| RECRC | Recirculate |
| RECS | Representative Shuttle Environmental Control System |
| RECT | Rectifier, Rectify |
| RECV | RECeiVe |
| RECVR | Receiver |
| RED | Reduction |