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Telegram Messenger, commonly known as Telegram, is a cloud-based, cross-platform, encrypted instant messaging (IM) service. It was originally launched for iOS on 14 August 2013 and Android in October 2013. It allows users to exchange messages, share media and files, and hold private and group voice or video calls as well as public livestreams.
The venue code (left) and digital sentry (right) used in Shanghai, China. The check-in code or the venue code ( Chinese: 场所 码, Chǎngsuǒgmǎ) is a QR code to record check-in locations for contact tracing and epidemiologic investigations. It was widely used in Australia and China during the COVID-19 pandemic in 2020–2022.
The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; the pattern of position detection was found and determined by applying the least-used ratio (1:1:3:1:1) in black ...
The Open Network. The Open Network (previously Telegram Open Network, [1] both abb. as TON) is a decentralized computer network [2] consisting of a layer-1 blockchain with various components. TON was originally developed by Nikolai Durov and the messaging platform, Telegram and now embraced by a global community of independent contributors.
This is a list of telegram services by country. Algérie Poste offers electronic telegram services under the name Barki@tic. Correo Argentino still offers telegram service within Argentina and to international destinations. Post Aruba still offers telegram service. Australia Post closed its telegram service on 7 March 2011.
WhatsApp Web's user interface is based on the default Android one and can be accessed through web.whatsapp.com. Access is granted after the users scan their personal QR code through their mobile WhatsApp application. There are similar solutions for macOS, such as the open-source ChitChat, previously known as WhatsMac.