CLI may refer to any of the following:
1. Short for Command Line Interface, CLI is an interface found on network devices, such as network routers. The interface allows the management and control of that network device.
2. CLI is also an operating system interface, see the command line definition for further information about this interface.
3. Short for Caller Line Identification, CLI is a service used to identify a telephone caller and the number they dialed. Similar to ANI.