| Subject | English | Icelandic |
| math. | class frequency | klefi tíðni |
| math. | class frequency | bekknum tíðni |
| comp., MS | class ID | klasakenni (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 | klasakenni (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) |
| math. | class mark | bekknum merkja |
| comp., MS | class materials | námsefni (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 | klasaeining (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 | stundaskrá (A view in which you can organize class materials into assignments and lessons) |
| math. | class symbol | bekk tákn |
| math. | k-class estimator | k-flokki metilsins |
| math. | latent class analysis | dulda eiginleika greiningu |
| math. | latent class analysis | hulda bekknum greiningu |