| Subject | English | Sinhala |
| comp., MS | add-in | ඇඩිනය (A supplemental program that can extend the capabilities of an application program) |
| comp., MS | add-on | ඇඩෝනය (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 | ඈඳුම් ආම්පන්නය (A device that is traditionally added to the base computer system to increase functionality, such as audio, networking, graphics, or SCSI controller) |
| comp., MS | COM add-in | COM ඇඩිනය (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 | Excel add-in | Excel ඈඳුම (Components that can be installed on your computer to add commands and functions to Excel. These add-in programs are specific to Excel. Other add-in programs that are available for Excel or Office are Component Object Model (COM) add-ins) |
| comp., MS | Mail Migration add-on | Mail Migration ඇඩ්-ඔන් (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 | PowerPoint add-in | PowerPoint ඈඳුම (An optional Live Meeting tool that allows users to create Live Meeting slides and add a presenter photo as part of a Microsoft PowerPoint file) |
| comp., MS | Quick add | ක්ෂණික දැන්වීම (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) |
| comp., MS | Word Add-in Library | Word ඈඳුම් පුස්තකාලය (A stand-alone, dynamic-link library that, when loaded, can add custom commands that extend the functionality of Microsoft Word. Commands and functions in a loaded WLL are also available to Microsoft Visual Basic projects) |