| Acronym | Meaning |
 | SSR | Radar Picket Submarine (retired US Navy Hull Classification) -Solid State Recorder |
| RB | Running Back (football) |
| TCU | Texas Christian University |
| SOI | Signal Operating Instruction |
| SNS | Spallation Neutron Source |
| GSM | General Service Medal - Grams Per Square Metre (paper Thickness; Properly G/m?) - Ground Station Module - Groupe Sp?cial Mobile (French |
| NI | Nicaragua (ISO 3166 Digram) - Nigeria (FIPS 10-4 Country Code) |
| NMD | U.S. National Missile Defense |
| BSW | British Standard Whitworth (screw Thread) |
| SAW | Squad Automatic Weapon - Surface Acoustic Wave |
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