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WhatsApp (officially WhatsApp Messenger) is an American instant messaging (IM) and voice-over-IP (VoIP) service owned by technology conglomerate Meta. [13] It allows users to send text, voice messages and video messages, [14] make voice and video calls, and share images, documents, user locations, and other content.
Russian nuclear icebreaker Arktika with call sign UKTY. Merchant and naval vessels are assigned call signs by their national licensing authorities. In the case of states such as Liberia or Panama, which are flags of convenience for ship registration, call signs for larger vessels consist of the national prefix plus three letters (for example, 3LXY, and sometimes followed by a number, e.g. 3LXY2).
WhatsApp has rolled out new features for its users. Here, a WhatsApp logo is displayed on a smartphone. Credit - Omar Marques/SOPA Images—Getty Images
(It is no longer necessary for U.S. amateur radio operators to change their call signs after moving into a new district.) Most amateurs going to an exotic location will add a "/location" suffix to show their current operating site, for example, a station visiting American Samoa might sign "(regular call sign)/KH8".
ICAO code in use by another company, call sign no longer allocated BRS Brazilian Air Force: BRAZILIAN AIR FORCE Brazil TH BRT British Regional Airlines: BRITISH United Kingdom defunct B2 BRU Belavia Belarusian Airlines BELARUS AVIA Belarus BRV Bravo Air Congo: BRAVO Democratic Republic of the Congo defunct BRW Bright Aviation Services: BRIGHT ...
Call sign Country Comments NP NIA Nile Air: NILE BIRD Egypt SIQ National Center for Atmospheric Research: SCIENCE QUEST United States NEJ Netjets Business Aviation: NET BUSINESS China NHV NHV Aviation: Ghana NHC Northern Helicopter: NORTHERN Germany DMD Namdeb Diamond Corporation: DIAMONDJET Namibia 6N NIN Niger Airlines: NIGER AIRLINES Niger ...
Call sign Country Comments JTN JET TEST United States JGJ Jinggong Jet: GLOBAL JINGGONG China 2014, [1] 2023 [2] JNY Journey Aviation: ROCKBAND United States 2023: Callsign "ROCKBAND"; [2] Former Call Sign/Telephony Designator: UNIJET-ROCKBAND (2014 [1]) JKR Justice Air Charter: JOKER United States Trading name for Reliant Aviation, allocated ...
A classic example of instant messaging on a desktop computer: the left window of this software showing a list of contacts ("buddy list") and the right window an active IM conversation An example of instant messaging on mobile, featuring the exchange of pictures and audio on top of text