PAGERS WERE DEVELOPED IN THE 1950S AND 1960S, AND BECAME WIDELY USED BY THE 1980S THROUGH THE LATE 1990S AND EARLY 2000S. THE UNIVERSITY OF HAWAII BEGAN USING RADIO TO SEND DIGITAL INFORMATION AS EARLY AS 1971, USING ALOHANET. FRIEDHELM HILLEBRAND CONCEPTUALISED SMS IN 1984 WHILE WORKING FOR DEUTSCHE TELEKOM. BBM, ALSO KNOWN BY ITS FULL NAME BLACKBERRY MESSENGER, WAS A CONSUMER-ORIENTED PROPRIETARY MOBILE INSTANT MESSENGER AND VIDEOTELEPHONY APPLICATION SERVICE ORIGINALLY DEVELOPED BY BLACKBERRY LIMITED. BBM WAS SHUT DOWN ON 31 MAY 2019; WHATSAPP (OFFICIALLY WHATSAPP MESSENGER) IS AN INSTANT MESSAGING (IM) AND VOICE-OVER-IP (VOIP) SERVICE OWNED BY TECHNOLOGY CONGLOMERATE META. WHATSAPP WAS FOUNDED IN FEBRUARY 2009 BY BRIAN ACTON AND JAN KOUM, FORMER EMPLOYEES OF YAHOO! A MONTH EARLIER, AFTER KOUM PURCHASED AN IPHONE
