| Subject | English | Polish |
| telegr. | national subscriber's telex number | numer krajowy abonenta teleksowego |
| comp., MS | subscriber access number | numer dostępu subskrybenta (A number that is configured in a Private Branch eXchange (PBX) that allows a subscriber to access their Microsoft Exchange mailbox over the telephone) |
| tel. | subscriber number | numer abonencki |