Use for questions about interfacing a computer with home automation devices, including X10 or other protocols. Do not use this tag for equipment unrelated to home automation that simply uses "X10" as a model name.
X10 is a protocol for communication among electronic devices used for home automation. It primarily uses power line wiring for signaling and control, where the signals involve brief radio frequency bursts representing digital information. A radio-based protocol is also defined, which allows wireless control of the devices.
Source: https://en.wikipedia.org/wiki/X10_%28industry_standard%29
This tag can also be used for questions about interfacing with home automation equipment involving protocols other than X10.