| Subject | English | Welsh |
| comp., MS | application programming interface | rhyngwyneb rhaglennu cymhwysiad (A set of routines that an application uses to request and carry out lower-level services performed by a computer's operating system. These routines usually carry out maintenance tasks such as managing files and displaying information) |
| comp., MS | Cryptography Application Programming Interface | Rhyngwyneb Rhaglennu Rhaglen Cryptograffeg (An (API) that is provided as part of Microsoft Windows. CryptoAPI provides a set of functions that allow applications to encrypt or digitally sign data in a flexible manner while providing protection for the user's sensitive private key data. Actual cryptographic operations are performed by independent modules known as (CSPs)) |
| comp., MS | Internet Server Application Programming Interface | Rhyngwyneb Rhaglennu Rhaglenni Gweinydd Rhyngrwyd (An application programming interface (API) that resides on a server computer for initiating software services tuned for Windows operating systems. In Microsoft Provisioning System, ISAPI resides on the Web server) |
| comp., MS | Messaging Application Programming Interface | Rhyngwyneb Rhaglennu Rhaglen Negeseua (A messaging architecture that enables multiple applications to interact with multiple messaging systems across a variety of hardware platforms. MAPI is built on the Component Object Model (COM) foundation) |
| comp., MS | programming language | iaith rhaglennu (An artificial language that specifies instructions to be executed on a computer. The term covers a wide spectrum, from binary-coded machine language to high-level languages) |