| Subject | English | Polish |
| gen. | add on | dobudować |
| comp., MS | add-on | dodatek (A device that is traditionally added to the base computer system to increase functionality, such as audio, networking, graphics, or SCSI controller) |
| ed. | add-on training | doskonalenie zawodowe |
| fin., insur. | capital add-on | narzut kapitałowy |
| comp., MS | Mail Migration add-on | dodatek Mail Migration (A tool that allows users to upload email messages, email folders, and contacts from an email account on their PC to the cloud to facilitate access from multiple devices) |
| comp., MS | Microsoft Online Services Sign-In Add-On | Dodatek logowania w witrynie Microsoft Online Services (A required update for Microsoft Online Services that updates the Microsoft Online Services ID Sign-In Assistant to work with other Office programs) |