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WhatsApp (officially WhatsApp Messenger) is an 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.
Legend: File formats: the image or video formats allowed for uploading; IPTC support: support for the IPTC image header . Yes - IPTC headers are read upon upload and exposed via the web interface; properties such as captions and keywords are written back to the IPTC header and saved along with the photo when downloading or e-mailing it
The PLATO system was launched in 1960 at the University of Illinois and subsequently commercially marketed by Control Data Corporation.It offered early forms of social media features with innovations such as Notes, PLATO's message-forum application; TERM-talk, its instant-messaging feature; Talkomatic, perhaps the first online chat room; News Report, a crowdsourced online newspaper, and blog ...
Instagram [a] is an American photo and video sharing social networking service owned by Meta Platforms.It allows users to upload media that can be edited with filters, be organized by hashtags, and be associated with a location via geographical tagging.
Facebook posts can have an unlimited number of characters, with images and videos. Users can "friend" users, both sides must agree to being friends. Posts can be changed to be seen by everyone (public), friends, people in a certain group (group) or by selected friends (private).
The report highlighted the risk of severe depression for "sexters" who lose control of their images and videos. [47] [48] Sexting is seen as irresponsible and promiscuous for adolescents, but "fun and flirty" for adults. [17] These risks tend to be exaggerated by news media, especially in regards to adolescent girls. [49] [50]
[a] Most captions draw attention to something in the image that is not obvious, such as its relevance to the text. A caption may be a few words or several sentences. Writing good captions takes effort; along with the lead and section headings, captions are the most commonly read words in an article, so they should be succinct and informative.
Often the caption or article will describe the image adequately, and where this is the case you can write alt=caption or alt=see adjacent text. If additional alt text is added, it should be a succinct description that complies with the content policies; see WP:ALT for more information.