| Acronym | Meaning |
 | CIS | Communication Interface System |
| CHR | Cooper-Harper Rating |
| CCB | Change Control Board |
| CMS-2 | Cambridge Monitoring System (IBM Computer Program) |
| CTA | Computer Technology Associates (GSFC) |
| COM | Computer Output Microfiche |
| PCO | Procuring Contracting Officer |
| SFTWE | Software |
| DTS | Data Transmission System |
| EKG | Electrocardiograph (Instrument) |
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