| Subject | English | Welsh |
| comp., MS | digital video disk | Disg Fideo Ddigidol (A form of storage characterized by high capacity (roughly 650 MB) and the use of laser optics rather than magnetic means for reading data. Optical disk storage commonly used for audio, video, and computer data. DVDs range in capacity from 4.7 GB to 17 GB, and can store significantly more than a CD-ROM) |
| comp., MS | disk cache | storfa disg (A portion of a computer's random access memory (RAM) set aside for temporarily holding information read from disk. A disk cache does not hold entire files, as does a RAM disk (a portion of memory that acts as if it were a disk drive). Instead, a disk cache is used to hold information that either has recently been requested from disk or has previously been written to disk. If the required information remains in a disk cache, access time is considerably faster than if the program must wait for the disk drive mechanism to fetch the information from disk) |
| comp., MS | disk drive | gyriant disg (A hardware device that reads data from and writes data to floppy disks) |
| comp., MS | disk partition | rhaniad disg (A section of space on a physical disk that functions as if it were a separate disk) |
| comp., MS | floppy disk | disg hyblyg (A reusable magnetic storage medium. The floppy disk used today is the rigid 3.5-inch microfloppy that holds 1.44 MB. It is called floppy because the first varieties were housed in bendable jackets) |
| comp., MS | floppy disk drive | gyriant disg hyblyg (A hardware device that reads data from and writes data to floppy disks) |
| comp., MS | hard disk drive | gyriant disg galed (A hardware device, or a logical partition of it, that reads data from and writes data to hard disks) |
| comp., MS | Microsoft Disk Operating System | System Weithredu Disg Microsoft (A Microsoft computer operating system with a command-line interface that is used to control many internal computer functions, such as running programs and organizing and maintaining files) |
| comp., MS | Universal Disk Format | Fformat Disg Eang (A file system defined by the Optical Storage Technology Association (OSTA) that is the successor to the CD-ROM file system (CDFS). UDF is used for removable disk media like DVD, CD, and magneto-optic (MO) disks) |
| comp., MS | virtual disk | disg rhithwir (A collection of one or more physical disks from a previously created storage pool) |