| Subject | Welsh | English |
| comp., MS | cronfa ddata blwch post | mailbox database (A database for storing mailboxes in Exchange Server. The mailbox database manages the data in mailboxes, tracks deleted messages and mailbox sizes, and assists in message transfers. A mailbox database is stored as an Exchange database (.edb) file) |
| comp., MS | cronfa ddata chwilio | search database (A database that stores search-related information, including stored procedures and tables that are used for crawler data, document metadata, and administration information) |
| comp., MS | cronfa ddata cynnwys | content database (The Microsoft SQL Server or WMSDE database that contains the content for one or more SharePoint sites) |
| comp., MS | cronfa ddata dilysu | authentication database (A database on a server that matches user names to passwords) |
| comp., MS | Cronfa Ddata Fewnol Windows, WID | Windows Internal Database (A relational data store that's included in Windows and is used by several Windows Services) |
| comp., MS | cronfa ddata ffurfweddu | configuration database (The Microsoft SQL Server, MSDE, or Windows Internal database that contains the configuration information that applies across all servers in a deployment of SharePoint Products and Technologies, such as Web application information) |
| comp., MS | cronfa ddata gosodiadau'r gydran | component settings database (A database that stores service information for each portal site in a deployment) |
| comp., MS | cronfa ddata gymdeithasol | social database (A database that is used to store social tagging information for a user, i.e. Social Comment or Social Tag or Social Rating) |
| comp., MS | cronfa ddata logio | logging database (The Microsoft SQL Server, MSDE, or WMSDE database that stores health monitoring and usage data temporarily, and can be used for reporting and diagnostics) |
| comp., MS | cronfa ddata storfa ddiogel | secure store database (The database used by the Secure Store Service to store credentials) |