| Subject | English | Welsh |
| comp., MS | Base Smart Card Cryptographic Service Provider | Darparwr Gwasanaeth Cryptograffeg Base Smart Card (The basic software module for by smart cards that performs cryptography and includes algorithms for authentication, encoding, and encryption) |
| comp., MS | Base Smart Card CSP | DGC Smart Card Sylfaen (The basic software module for by smart cards that performs cryptography and includes algorithms for authentication, encoding, and encryption) |
| comp., MS | smart card | cerdyn clyfar (A plastic (credit card–sized or smaller) device with an embedded microprocessor and a small amount of storage that is used, with an access code, to enable certificate-based authentication. Smart cards securely store certificates, public and private keys, passwords, and other types of personal information) |
| comp., MS | smart file | ffeil glyfar (A file that is only available when a device is connected to the Internet so that the file's data uses little space in the device's storage) |
| comp., MS | Virtual Smart Card | Smart Card Rhithwir (The ability for some devices to act like physical smart cards even if they aren't) |