| Abbreviation | Definition |
|---|---|
| HMSC | Hughes Missile Systems Company |
| HMSG | Healthcare Management Services Group |
| HMSI | Hitachi Micro Systems, Inc. |
| HMSI | Honda Motorcycles and Scooters India |
| HMSI | Houston Management Systems, Inc. |
| HMSL | Hetero Med Solutions Ltd |
| HMSL | Honda Motorcycles and Scooters Ltd |
| HMSP | Houston MotorSports Park |
| HMSW | Hour Meter - Stewart Warner |
| HMT | Hindustan Machine Tools |
| HMTC | Hampshire MicroTechnology Centre (Company) |
| HMTC | Hereford Musical Theatre Company |
| HMTS | Hardinge Machine Technology Show (Hardinge Inc.) |
| HMTS | Hoan My Trading Services Jsc |
| HMV | Hindustan Music Venture |
| HMV | Hollywood Music and Video |
| HMV | Hot Music and Videos |
| HNA | Heartland Nannies Agency |
| HNA | Honda North America, Inc. |
| HNAA | Howard Nowes Ancient Art |