| Acronym | Meaning |
| ISI | Information Spectrum Inc |
| DTU | Data Transfer Unit |
| EC | Engineering Change |
| MED | Medium |
| DD250 | Material Inspection And Receiving Report |
| QCPI | Quality Conformance Preliminary Inspection (in-plant) |
| CCA | Critical Characteristics Audit |
| MTBUR | Mean Time Between Unscheduled Removal |
| IM | Information Management |
| PRS | Provisioning Requirements Statement |