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  2. Quizlet - Wikipedia

    en.wikipedia.org/wiki/Quizlet

    In 2017, 1 in 2 high school students used Quizlet. [4] As of December 2021, Quizlet has over 500 million user-generated flashcard sets and more than 60 million active users. [ 5 ]

  3. Return address - Wikipedia

    en.wikipedia.org/wiki/Return_address

    Envelope with return address in top left corner. In postal mail, a return address is an explicit inclusion of the address of the person sending the message. It provides the recipient (and sometimes authorized intermediaries) with a means to determine how to respond to the sender of the message if needed.

  4. Linux - Wikipedia

    en.wikipedia.org/wiki/Linux

    The Linux market is growing, and the Linux operating system market size is expected to see a growth of 19.2% by 2027, reaching $15.64 billion, compared to $3.89 billion in 2019. [140] Analysts project a Compound Annual Growth Rate (CAGR) of 13.7% between 2024 and 2032, culminating in a market size of US$34.90 billion by the latter year.

  5. Simple Mail Transfer Protocol - Wikipedia

    en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol

    C: This is a test message with 5 header fields and 4 lines in the message body. C: Your friend, C: Bob C:. S: 250 Ok: queued as 12345 C: QUIT S: 221 Bye {The server closes the connection} The client notifies the receiver of the originating email address of the message in a MAIL FROM command.

  6. Network interface controller - Wikipedia

    en.wikipedia.org/wiki/Network_interface_controller

    A network interface controller (NIC, also known as a network interface card, [3] network adapter, LAN adapter and physical network interface [4]) is a computer hardware component that connects a computer to a computer network. [5] Early network interface controllers were commonly implemented on expansion cards that plugged into a computer bus.

  7. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    The first American-made pocket-sized calculator, the Bowmar 901B (popularly termed The Bowmar Brain), measuring 5.2 by 3.0 by 1.5 inches (132 mm × 76 mm × 38 mm), came out in the Autumn of 1971, with four functions and an eight-digit red LED display, for US$240, while in August 1972 the four-function Sinclair Executive became the first ...

  8. Net neutrality - Wikipedia

    en.wikipedia.org/wiki/Net_neutrality

    Network neutrality, often referred to as net neutrality, is the principle that Internet service providers (ISPs) must treat all Internet communications equally, offering users and online content providers consistent transfer rates regardless of content, website, platform, application, type of equipment, source address, destination address, or method of communication (i.e., without price ...

  9. IPv4 - Wikipedia

    en.wikipedia.org/wiki/IPv4

    The last address has all host bits set to 1. It is used as a local broadcast address for sending messages to all devices on the subnet simultaneously. For networks of size / 24 or larger, the broadcast address always ends in 255. For example, in the subnet 192.168.5.0 / 24 (subnet mask 255.255.255.0) the identifier 192.168.5.0 is used to refer ...