| Subject | English | Welsh |
| comp., MS | allocation unit | uned clustnodi (The smallest amount of disk space that can be allocated to hold a file) |
| comp., MS | central processing unit | uned brosesu ganolog (The computational and control unit of a computer. The CPU is the device that interprets and executes instructions. Mainframes and early minicomputers contained circuit boards full of integrated circuits that implemented the CPU. Single-chip central processing units, called microprocessors, made possible personal computers and workstations) |
| comp., MS | organizational unit | uned drefniadaethol (A type of entry that is used specifically for storing information on a section of an organization. It can represent a department or a group of people, for example, ou = Accounting Dept) |
