| Acronym | Meaning |
 | GIS | Geographic Information System |
| AMS | American Mobile Satellite Corporation |
| HDLC | High-level Data Link Control |
| TSR | Terminate-and-Stay-Resident |
| CGA | Color Graphics Adapter |
| XMS | Extended Memory Specification |
| DSU | Data Service Unit |
| GPF | General Protection Fault |
| PC/TV | Personal Computer And Television |
| CDC | Cult Of The Dead Cow |
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