The document discusses terminal emulation, the Telnet protocol, Telnet hosts, and keyboards in remote computing. When a client connects to a host, they negotiate how to communicate using terminal emulation and the Telnet protocol assumes each end is a virtual terminal. The Telnet host receives and processes data sent from the client and returns results to the client's screen. The keyboard is used to send data from the local virtual terminal to the remote one, with keys sending data when typed.