| Acronym | Meaning |
 | EOP | Experiments Of Opportunity |
| IDD | Interface Definition Document(s) |
| PMEL | Precision Measurements Equipment Laboratory |
| CPSS | Critical Phase System Software |
| DDC | Defense Documentation Center |
| RCPT | Receptacle |
| PCIN | Program Change Identification Number |
| SOR | Specification Operational Requirement |
| ORT | Orbit Readiness Test |
| GCE | Ground Checkout Equipment |
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