| Subject | English | Welsh |
| comp., MS | command line | llinell gorchymyn (A string of text written in the command language and passed to the command interpreter for execution) |
| comp., MS | Horizontal Line | Llinell ar Draws (A Web page editor command that inserts a horizontal line onto a Web page) |
| comp., MS | join line | llinell ymuno (A line that connects fields between two tables and shows how the data is related. The type of join indicates which records are selected for the query's result set) |
| comp., MS | leader line | llinell arwain (A line or row of characters used to lead the eye from a data label to a data point, or from a callout to the appropriate part of an illustration) |
| comp., MS | line break | toriad llinell (The point at which one line ends and another begins) |
| comp., MS | line chart | siart llinell (A chart that shows trends in data at equal intervals, with values from one or more sets of data connected by lines) |
| comp., MS | line-of-business application | rhaglen llinellau busnes (An application that is vital to running enterprises, such as payroll, resource planning, supply chain management, and accounting) |
| comp., MS | line spacing | bwlch rhwng llinellau (The amount of space from the bottom of one line of text to the bottom of the next line) |
| comp., MS | line wrap | amlapio llinell (The ability of a word-processing program or a text-editing program to break lines of text automatically to stay within the page margins or window boundaries of a document without the user having to do so with carriage returns, as is typically necessary on a typewriter) |
| comp., MS | manual line break | toriad llinell bwriadol (A nonprinting mark you insert to end the current line and continue the text on the next line) |
| comp., MS | orphan line | llinell amddifad (The first line of a paragraph printed by itself at the bottom of a page) |
| comp., MS | outside line access code | cod mynediad llinell allanol (The prefix that is used to access an outside line. In the United States, this prefix is typically 9) |
| comp., MS | series line | llinell cyfres (In 2-D stacked bar and column charts, a line that connects the data markers in a data series and is used to emphasize the difference in measurement between each series) |
| comp., MS | signature line | llinell llofnod (A control that allows users to digitally sign a form or document) |
| comp., MS | subject line | llinell pwnc (The part of a message header that is used by the sender to indicate the object of the message) |