You might have a password, you need to type a code in for your privacy, get on the network.
你可能有一个密码，你需要输入密码来保护你的隐私，然后连接上网络。
简单心理学
But if it's your home phone number you probably type it in quickly: area code, then the first three numbers and then the last four.
但如果是你的家庭电话号码，你可能会很快输入：区号，然后是前三个号码，最后是后四位号码。
英语百科
Type code
A type code is the only mechanism used in pre-OS X versions of the Macintosh operating system to denote a file's format, in a manner similar to file extensions in other operating systems. Codes are four-byte OSTypes. For example, the type code for a HyperCard stack is STAK; the type code of any application program is APPL.