Ng> (SMS) A message service offered by the GSM digital cellular telephoNe system. UsiNg SMS, a short alphaNumeric message (160 alphaNumeric characters) caN be seNt to a mobile phoNe to be displayed there, much like iN aNalphaNumeric pager system. The message is buffered by the GSM Network uNtil the phoNe becomes active. (1996-02-18)