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In 1933, the German Reichspost (Reich postal service) introduced the first "telex" service.Friedhelm Hillebrand conceptualised SMS in 1984 while working for Deutsche Telekom.Advertisers and service providers use direct text marketing to send messages to mobile users about promotions, payment due dates, and other notifications instead of using postal mail, email, or voicemail.The service is referred to by different colloquialisms depending on the region.Under SS7, it is a "state" with a 160 character data, coded in the ITU-T "T.56" text format, that has a "sequence lead in" to determine different language codes, and may have special character codes that permits, for example, sending simple graphs as text.This was part of ISDN (Integrated Services Digital Network) and since GSM is based on this, made its way to the mobile phone.Messages could be sent and received on ISDN phones, and these can send SMS to any GSM phone.
This makes texting a quick and easy way to communicate with friends and colleagues, including in contexts where a call would be impolite or inappropriate (e.g., calling very late at night or when one knows the other person is busy with family or work activities).
The term originally referred to messages sent using the Short Message Service (SMS).
It has grown beyond alphanumeric text to include multimedia messages (known as MMS) containing digital images, videos, and sound content, as well as ideograms known as emoji (happy faces, sad faces, and other icons).
Finnish Radiolinja became the first network to offer a commercial person-to-person SMS text messaging service in 1994.
When Radiolinja's domestic competitor, Telecom Finland (now part of Telia Sonera) also launched SMS text messaging in 1995 and the two networks offered cross-network SMS functionality, Finland became the first nation where SMS text messaging was offered on a competitive as well as on a commercial basis.
Like e-mail and voice mail, and unlike calls (in which the caller hopes to speak directly with the recipient), texting does not require the caller and recipient to both be free at the same moment; this permits communication even between busy individuals.