| Abbreviation |
Definition |
| RAD |
Radiation |
| RADIUS |
Remote Access Dial in User Security |
| RAID |
Redundant Array of Independent (or Inexpensive) Disks |
| RAM |
Random Access Memory |
| RAS |
Remote Access Server |
| RCPTL |
Receptacle |
| REDUN |
Redundant |
| REF |
Reference |
| REFURB |
Refurbished |
| REGUL |
Regulated |
| REM |
Remote |
| REMAN |
Remanufactured |
| REMOVE |
Removable |
| RENEW |
Renewal |
| RFI |
Radio Frequency Interference |
| RH |
Right-Handed |
| RI/RO |
Ring in/Ring out |
| RIB |
Ribbon |
| RISC |
RISC Processor |
| RM |
Rackmount |
| RO |
Rewriteable Optical |
| RPL |
Remote Program Load |
| RPLMNT |
Replacement |
| RPT |
Report |
| RPTR |
Repeater |
| RPS |
Redundant Power Supply |
| RT |
Run-time |
| RTR |
Router |
| RTRAC |
Rear Tractor Feed |
| RU |
Russian number (x = number) |
| Rxxxx |
Revision number (x = number) |