| HMAC | Harrisburg Midtown Arts Center 
| Others |
| HMAC | Hash Based Message Authentication Code
| Others |
| HMAC | Hash Message Authentication Code
| Others |
| HMAC | Hash-based Message Authentication Code
| Others |
| HMAC | Hashed Message Authentication Code
| Others |
| HMAC | Hashed Message Authentication codes
| Others |
| HMAC | Hashing for Message Authentication Calculator
| Others |
| HMAC | Hashing for Message Authentication Codes
| Others |
| HMAC | Hater Magnet Apparel Company
| Others |
| HMAC | Hazardous Materials Advisory Council
| Others |
| HMAC | Healthcare Mortgagee Advisory Council
| Others |
| HMAC | High Modulus Asphalt Concrete
| Others |
| HMAC | His Majesty's Armoured Car
| Others |
| HMAC | Hobart Model Aero Club
| Others |
| HMAC | Home Mission And Advancement Committee
| Others |
| HMAC | Home Mortgage Acceptance Corporation
| Others |
| HMAC | Home Mortgage Alliance Corporation
| Others |
| HMAC | Hot Mix Asphalt Concrete
| Others |
| HMAC | Hot Mixed Ashphat Concrete
| Others |
| HMAC | Hot Mixed Asphalt Concrete
| Others |
| HMAC | House of Music Arts and Culture
| Others |