GSM(redirected from HSCSD)
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An international telecommunications standard for the transmission of voice and data between cell phones and other mobile devices.
[Originally short for French Groupe Spécial Mobile, Special Mobile Group, now officially short for Global System for Mobile Communications.]
(Printing, Lithography & Bookbinding) grams per square metre: the term used to specify the weight of paper
(Telecommunications) Global System for Mobile Communications