| Acronym | Meaning |
| IDS | International Data Service |
| BSR | Bus Select Relay |
| MITI | Ministry Of International Trade And Industry |
| CAE | Computer Aided Engineering |
| DDE | Dynamic (or Direct) Data Exchange |
| DDF | Digital Data Formatter |
| HRS | Hardwae Requirements Specification |
| MST | Mesospheric/stratospheric/tropospheric |
| RSCS | Remote Spooling Communications Subsystem |
| PIBALS | Pilot Balloons |