| Subject | English | Japanese |
| comp., MS | class ID | クラス ID (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. | n class ID | クラスＩＤ |
| comp., MS | Class ID extension | クラス ID 拡張子 (An extended HTML element that is used to describe the class of a viewable or downloadable document. It can be misused to pass dangerous attachments; EHS allows users to block this tag) |