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The term originally referred to messages sent using the Short Message Service (SMS).
This was part of ISDN (Integrated Services Digital Network) and since GSM is based on this, made its way to the mobile phone.
In 1933, the German Reichspost (Reich postal service) introduced the first "telex" service.
Friedhelm Hillebrand conceptualised SMS in 1984 while working for Deutsche Telekom.
Text messaging, or texting, is the act of composing and sending electronic messages, typically consisting of alphabetic and numeric characters, between two or more users of mobile devices, desktops/laptops, or other type of compatible computer.
Text messages may be sent over a cellular network, or may also be sent via an Internet connection.