| Subject | English | Welsh |
| comp., MS | class ID | ID dosbarth (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 | class identifier | dynodydd dosbarth (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 | class materials | deunyddiau dosbarth (Content and resources that are made available as part of a class and that can be associated with individual lessons or assignments) |
| comp., MS | class module | modiwl dosbarth (A module that can contain the definition for a new object. Each instance of a class creates a new object. Procedures defined in the module become properties and methods of the object) |
| comp., MS | Class Schedule | Amserlen Dosbarth (A view in which you can organize class materials into assignments and lessons) |
| comp., MS | first class object | gwrthrych gradd flaenaf (A top-level object for building dashboards in PerformancePoint Services) |
| comp., MS | .NET Framework class library | llyfrgell dosbarthiadau .NET Framework (A library of classes, interfaces, and value types that are included in .NET Framework. This library provides access to system functionality and is designed to be the foundation on which .NET Framework applications, components, and controls are built) |