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Caffeine. Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class and is the most commonly consumed psychoactive substance globally. [9][10] It is mainly used for its eugeroic (wakefulness promoter), ergogenic (physical performance enhancing), or nootropic (cognition improving) properties. [11][12] Caffeine acts by ...
SMS. SMS (short message service) is a text messaging service component of most telephone, Internet, and mobile device systems. It uses standardized communication protocols to enable mobile devices to exchange short text messages. An intermediary service can facilitate a text-to-voice conversion to be sent to landlines.
Its name is an acronym for "Whole Earth 'Lectronic Link, coined by Stewart Brand, creator of the Whole Earth Catalog. [citation needed] 1990s–2000s. Various notable social media platforms such as Myspace and Facebook are developed and released, and blogging begins to gain popularity.
Examples of such messaging services include: Skype, Facebook Messenger, Google Hangouts (subsequently Google Chat), Telegram, ICQ, Element, Slack, Discord, etc. Users have more options as usernames or email addresses can be used as user identifiers, besides phone numbers. Unlike the phone-based model, user accounts on a multi-device model are ...
t.co is a URL shortening service created by Twitter. [36] It is only available for links posted to Twitter and not available for general use. [36] All links posted to Twitter use a t.co wrapper. [47] Twitter hopes that the service will be able to protect users from malicious sites, [36] and will use it to track clicks on links within tweets ...
Skype pioneered peer-to-peer (P2P) technology for IP telephony. [4] Its architecture includes supernodes, ordinary nodes, and a login server.Each client maintains a cache of reachable supernodes, while user directory data is distributed across these supernodes, organized into slots and blocks.
Yahoo! Messenger added video capabilities in 2001, [32] and by 2005 such features were built-in also in AIM, MSN Messenger, and Skype. [33] There were a reported 100 million users of instant messaging in 2001. [34] As of 2003, AIM was the globally most popular instant messenger with 195 million users and exchanges of 1.6 billion messages daily ...
With Twitter in disarray since the world's richest person took control of it last week, Mastodon, a decentralised, open alternative from privacy-obsessed Germany, has seen a flood of new users.