| Subject | English | Estonian |
| commun., transp., avia. | Air Traffic Services Message Handling System | lennundusteadete vahendamise süsteem |
| gen. | Air Traffic Services Message Handling System | AMHS- süsteem |
| commun., transp., avia. | ATS Message Handling System | lennundusteadete vahendamise süsteem |
| gen. | ATS Message Handling System | AMHS- süsteem |
| comp., MS | message transfer system | sõnumiedastussüsteem (The X.400 term for a messaging system, which is a product that enables electronic communication over a network) |