| Acronym | Meaning |
| PHB | Photochemical Hole Burning |
| CRT | Cathode-Ray Tube |
| GPS | Global Positioning Satellite (System) |
| AT | Attention |
| MTA | Media Terminal Adapter |
| SGML | Standard Generalized Markup Language |
| ARM | Advanced RISC Machines Ltd |
| CSU | Channel Service Unit |
| ESP | Encapsulating Security Payload |
| JEIDA | Japan Electronic Industry Development Association |