| Subject | English | Welsh |
| comp., MS | cross-functional flowchart | siart llif swyddogaethau (A type of flowchart that shows the relationship between a business process and the functional units (such as departments) responsible for that process) |
| comp., MS | cross hatch | croeslin (Shading made up of regularly spaced, intersecting lines) |
| comp., MS | cross-site publishing | cyhoeddi ar draws safleoedd (A content publishing model in which multiple sites select and republish content that is authored and managed in a single source location) |
| comp., MS | cross-site request forgery | ffugio cais ar draws safleoedd (An attack where a malicious website makes an HTTP request to a target website in such a way that the website thinks that the request is part of a legitimate user's session) |