| Subject | English | Galician |
| comp., MS | add-in | suplemento (A supplemental program that can extend the capabilities of an application program) |
| comp., MS | add-on | complemento (A device that is traditionally added to the base computer system to increase functionality, such as audio, networking, graphics, or SCSI controller) |
| comp., MS | add-on device | dispositivo complementario (A device that is traditionally added to the base computer system to increase functionality, such as audio, networking, graphics, or SCSI controller) |
| comp., MS | Add to Contacts List | Engadir á lista de contactos (An item on the shortcut menu that adds a selected person to the user's Contacts list) |
| comp., MS | COM add-in | suplemento COM (A supplemental program with the filename extension .dll or .exe that extends the capabilities of a program by adding custom commands and specialized features) |
| comp., MS | Mail Migration add-on | complemento 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 | Quick add | Engadir rápido (The Web page object that assists users in finding both public (Web and Windows Live) and private (my Windows Live content) content for insertion into their authored content) |