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  2. Massive open online course - Wikipedia

    en.wikipedia.org/wiki/Massive_open_online_course

    A massive open online course (MOOC / m uː k /) or an open online course is an online course aimed at unlimited participation and open access via the Web. In addition to traditional course materials, such as filmed lectures, readings, and problem sets, many MOOCs provide interactive courses with user forums or social media discussions to support community interactions among students ...

  3. Card not present transaction - Wikipedia

    en.wikipedia.org/wiki/Card_not_present_transaction

    If a fraudulent CNP transaction is reported, the acquiring bank hosting the merchant account that received the money from the fraudulent transaction must make restitution to the cardholder, which is called a chargeback. This is the opposite of a card present transaction, when the issuer of the card is liable for restitution.

  4. Distributed computing - Wikipedia

    en.wikipedia.org/wiki/Distributed_computing

    Distributed computing is a field of computer science that studies distributed systems. A distributed system is a system whose components are located on different networked computers, which communicate and coordinate their actions by passing messages to one another from any system.

  5. United States passport - Wikipedia

    en.wikipedia.org/wiki/United_States_passport

    United States passports are passports issued to citizens and nationals of the United States of America. They are issued exclusively by the U.S. Department of State. Besides passports (in booklet form), limited-use passport cards are issued by the same government agency subject to the same requirements.

  6. Freemium - Wikipedia

    en.wikipedia.org/wiki/Freemium

    Freemium, a portmanteau of the words "free" and "premium," is a pricing strategy by which a basic product or service is provided free of charge, but money (a premium) is charged for additional features, services, or virtual (online) or physical (offline) goods that expand the functionality of the free version of the software.

  7. DNA - Wikipedia

    en.wikipedia.org/wiki/DNA

    Deoxyribonucleic acid (/ d iː ˈ ɒ k s ɪ ˌ r aɪ b oʊ nj uː ˌ k l iː ɪ k,-ˌ k l eɪ-/ (); DNA) is a polymer composed of two polynucleotide chains that coil around each other to form a double helix.

  8. Memory leak - Wikipedia

    en.wikipedia.org/wiki/Memory_leak

    Memory allocation is dynamic – each process gets as much memory as it requests. Active pages are transferred into main memory for fast access; inactive pages are pushed out to secondary storage to make room, as needed. When a single process starts consuming a large amount of memory, it usually occupies more and more of main memory, pushing ...

  9. Nonprofit organization - Wikipedia

    en.wikipedia.org/wiki/Nonprofit_organization

    A nonprofit organization (NPO) or non-profit organisation, also known as a non-business entity, not-for-profit organization, or nonprofit institution, is a legal entity organized and operated for a collective, public or social benefit, in contrast with an entity that operates as a business aiming to generate a profit for its owners.