| Abbreviation | Definition |
|---|---|
| 1116 | Eleven sixteenths used in metrics, socket sets, by mechanics, etc |
| 1316 | Thirteen sixteenths; used in metrics, socket sets, by mechanics, etc |
| 1516 | Fifteen sixteenths; used in metrics, socket sets, by mechanics, etc |
| 316 | Three eighths; used in metrics, socket sets, by mechanics, etc |
| 38 | Three eighths; used in metrics, socket sets, by mechanics, etc |
| 516 | Five sixteenths; used in metrics, socket sets, by mechanics, etc |
| 78 | Seven eighths; used in metrics, socket sets, by mechanics, etc |
| 916 | Nine sixteenths; used in metrics, socket sets, by mechanics, etc |
| AAM | American Academy of Mechanics |
| AAMM | Advances in Applied Mathematics and Mechanics |
| AARC | Australian Automotive Research Centre |
| ABS | Air Break Switch |
| ACCB | Angular Contact Ball Bearing |
| ACFM | Asian Congress of Fluid Mechanics |
| ACH | Air Change per Hour |
| ADS | Auto Deceleration System |
| AEBS | Advanced Emergency Braking System |
| AEM | Aerospace Engineering and Mechanics |
| AIR | Alternate Inflator Regulator |
| AJ | Ask Jarvis |