| Acronym | Meaning |
 | TIROS | ToPographical Infrared Operations Satellite |
| PHM | Per Hundred Million |
| ND | Neodymium |
| SMW | Standard Materials Worksheet |
| DCR | Document Change Record (or Review) |
| UER | Unique Equipment Register |
| OODP | Out-of-Detent Pitch |
| USS | United States Ship |
| SRS | Support Requirements System |
| PS | Power Supply |
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