| Subject | English | Welsh |
| comp., MS | Attachment Previewer | Rhagolygydd Atodiad (An application that is used to open an attachment for Attachment Previewing) |
| comp., MS | Attachment Previewing | Rhagolwg Atodiad (A feature that allows users to see and interact with E-mail messages and their attachments side by side in the reading pane) |
| comp., MS | Attachment Reminder | Nodyn Atgoffa Atodiad (A feature that alerts the user before an email message is sent if it detects that an attachment may have been omitted from the message) |
| comp., MS | list item attachment | atodiad eitem rhestr (" A file contained within a list item that is stored in a folder in the list with the segment "Attachments.") |