| Acronym | Meaning |
 | PRC | Inc. |
| HEOS-A2 | Highly Eccentric Orbit Satellite |
| EPIC | Environmental Photographic Interpretation Center |
| PRE-AWIPS | Preprototype AWIPS |
| OPLE | Omega Position Location Equipment |
| JCS | Joint Chiefs Of Staff |
| ERDA | Energy Research And Development Administration |
| MARC | Middle Atmosphere Responses To Changes |
| CALUTRON | California University Cyclotron |
| ACDA | Arms Control And Disarmament Agency |
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