| Subject | English | Catalan |
| comp., MS | add a favorite | afegir un preferit (To add something to one's Favorites folder) |
| comp., MS | add call | afegeix trucada (A button that appears during an active phone call, allowing a user to add another person to his/her conference call) |
| comp., MS | add-in | complement (A supplemental program that can extend the capabilities of an application program) |
| comp., MS | add-on | complement (A device that is traditionally added to the base computer system to increase functionality, such as audio, networking, graphics, or SCSI controller) |
| cinema | add the sound track to a film | sonoritzar |
| comp., MS | Add to Contacts List | Afegeix a la llista de contactes (An item on the shortcut menu that adds a selected person to the user's Contacts list) |
| comp., MS | Conferencing Add-in for Microsoft Outlook | Complement per a conferències per al Microsoft Outlook (A Microsoft Outlook add-in that allows you to schedule a Live Meeting or Lync or Office Communicator conference call from Outlook) |
| comp., MS | Mail Migration add-on | complement 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 | Afegeix ràpidament (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) |