This subsequently became the basis for the 140 character limit now used by Twitter.
The material elaborated in GSM and its WP1 subgroup was handed over in Spring 1987 to a new GSM body called IDEG (the Implementation of Data and Telematic Services Experts Group), which had its kickoff in May 1987 under the chairmanship of Friedhelm Hillebrand (German Telecom).
•
The SMS concept was developed in the Franco-German GSM cooperation in 1984 by Friedhelm Hillebrand and Bernard Ghillebaert.
Friedhelm Hillebrand | William Hillebrand | Friedhelm Konietzka | Friedhelm Funkel | Friedhelm Döhl |