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Under HTTP 1.0, connections should always be closed by the server after sending the response. [1]Since at least late 1995, [2] developers of popular products (browsers, web servers, etc.) using HTTP/1.0, started to add an unofficial extension (to the protocol) named "keep-alive" in order to allow the reuse of a connection for multiple requests/responses.
CDF faded away and was removed from the browsers of the time, replaced in the 2000s with RSS (a pull system.) Other uses of push-enabled web applications include software updates distribution ("push updates"), market data distribution (stock tickers), online chat/messaging systems ( webchat ), auctions, online betting and gaming, sport results ...
The original meaning of push and pull, as used in operations management, logistics and supply chain management. In the pull system production orders begin upon inventory reaching a certain level, while on the push system production begins based on demand (forecasted or actual demand). The CONWIP is a hybrid between a pure push and pure pull system.
An example of Internet of Things being used to connect a home thermostat. Internet of things (IoT) describes devices with sensors, processing ability, software and other technologies that connect and exchange data with other devices and systems over the Internet or other communication networks.
In aviation, pushback is an airport procedure during which an aircraft is pushed backwards away from its parking position, usually at an airport gate by external power. [ 1 ] [ 2 ] Pushbacks are carried out by special, low-profile vehicles called pushback tractors or tugs .