Teleprinter messages, also known as Telexes, are a form of communication that uses a teleprinter to send and receive messages. They were used in the early days of telecommunications before the advent of the internet and email. Telexes were used for business communications, such as sending orders, invoices, and other documents. They were also used for personal communications, such as sending letters and postcards. Telexes were sent over telephone lines or radio waves, and could be sent to any location in the world.