Teleprinter is a term that refers to a type of electronic device that is capable of transmitting and receiving messages through a network. There are several synonyms for the word "teleprinter", some of which include "teletype", "telex machine", "telegraph machine", "telegram transmission system", and "telegraph instrument". These terms are often used interchangeably to describe devices that can be used to send and receive messages across large distances. The teleprinter machine has become obsolete with the advent of computer networks and the internet, but the term "teleprinter" is still used in some contexts to describe legacy systems that continue to use this technology.