| Subject | English | Chinese simplified |
| comp., MS | X-header | X 标头 (" An e-mail message header that begins with "X-".") |
| comp., MS | X-Header storage option | X 标头存储选项 (The option that adds an X-Header to the Internet header of spam messages. Information contained in this X-Header is specified by administrators in the Administration Center) |
| comp., MS | x-ua-compatible header | x-ua-compatible 头 (An HTML header in which the HTTP-EQUIV property has a value of x-ua-compatible, which allows content to specify the document compatibility modes supported by the webpage) |