| Subject | English | Welsh |
| comp., MS | ancestor element | elfen hynafiad (In a tree structure, the element of which a given element is a child. Equivalent to a parent element) |
| comp., MS | chart element | elfen siart (One of the distinct pieces that make up a chart, such as a title, axis, legend, trendline, or error bar) |
| comp., MS | child element | iselfen (In a tree structure, an element that is contained by a parent element. A subordinate element) |
| comp., MS | design element | elfen dylunio (An item (such as a page, frameset, item type, form, view, script file, text file, cascading style sheet, or image) that contributes to an overall pattern, scheme, or layout) |
| comp., MS | document element | elfen dogfen (The element in an XML document that contains all other elements. It is the top-level element of an XML document and must be the first element in the document) |
| comp., MS | picture element | elfen llun (The smallest element used to form the composition of an image on a computer monitor. Computer monitors display images by drawing thousands of very small pixels arranged in columns and rows) |
| comp., MS | root element | elfen wraidd (The element in an XML document that contains all other elements. It is the top-level element of an XML document and must be the first element in the document) |
| comp., MS | XML element | elfen XML (An XML structure that consists of a start tag, an end tag, and the information between the tags. Elements can have attributes and can contain other elements) |