| Subject | English | Polish |
| commun., transp., avia. | Air Traffic Services Message Handling System | system wymiany depesz ATS |
| commun., transp., avia. | ATS Message Handling System | system wymiany depesz ATS |
| comp., MS | message transfer system | system transferu wiadomości (The X.400 term for a messaging system, which is a product that enables electronic communication over a network) |