| Subject | Welsh | English |
| comp., MS | dynodydd digwyddiad | event handler (A software routine that executes in response to an event) |
| comp., MS | dynodydd dosbarth | class identifier (A universally unique identifier (UUID) that identifies a COM component. Each COM component has its CLSID in the Windows registry so that it can be loaded by other applications) |
| comp., MS | dynodydd gwasanaeth | service set identifier (A unique set of letters or numbers that identifies a wireless network. For a computer or device to connect to a wireless network, it must supply that network's SSID. An SSID can be up to 32 characters) |
| comp., MS | Dynodydd locale | locale identifier (A 32-bit value which consists of the language ID in the low word (bits 0-15) and the sorting ID (bits 16-19) and a reserved value (bits 20-31) in the high word) |
| comp., MS | dynodydd parth eang | global domain identifier (An identifier that specifies the country/region, the administration management domain (ADMD), and the private management domain (PRMD) of an X.400 e-mail address. For example c=us; a=MCI; p=msft) |
| comp., MS | dynodydd peilot | pilot identifier (The string that is received with a new call that is used to associate the call with a dial plan) |