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  2. Copyleft - Wikipedia

    en.wikipedia.org/wiki/Copyleft

    Copyleft is a distinguishing feature of some free software licenses, while other free-software licenses are not copyleft licenses because they do not require the licensee to distribute derivative works under the same license. There is an ongoing debate as to which class of license provides the greater degree of freedom.

  3. Cut, copy, and paste - Wikipedia

    en.wikipedia.org/wiki/Cut,_copy,_and_paste

    The inversion from verb—object to object—verb on which copy and paste are based, where the user selects the object to be operated before initiating the operation, was an innovation crucial for the success of the desktop metaphor as it allowed copy and move operations based on direct manipulation. [3]

  4. Data cleansing - Wikipedia

    en.wikipedia.org/wiki/Data_cleansing

    Data cleansing or data cleaning is the process of identifying and correcting (or removing) corrupt, inaccurate, or irrelevant records from a dataset, table, or database.It involves detecting incomplete, incorrect, or inaccurate parts of the data and then replacing, modifying, or deleting the affected data. [1]

  5. BASIC interpreter - Wikipedia

    en.wikipedia.org/wiki/BASIC_interpreter

    First implemented as a compile-and-go system rather than an interpreter, BASIC emerged as part of a wider movement towards time-sharing systems. General Electric, having worked on the Dartmouth Time-Sharing System and its associated Dartmouth BASIC, wrote their own underlying operating system and launched an online time-sharing system known as Mark I featuring a BASIC compiler (not an ...

  6. User interface - Wikipedia

    en.wikipedia.org/wiki/User_interface

    The Xfce desktop environment offers a graphical user interface following the desktop metaphor.. In the industrial design field of human–computer interaction, a user interface (UI) is the space where interactions between humans and machines occur.

  7. Search engine - Wikipedia

    en.wikipedia.org/wiki/Search_engine

    A query from a user can be a single word, multiple words or a sentence. The index helps find information relating to the query as quickly as possible. [ 35 ] Some of the techniques for indexing, and caching are trade secrets, whereas web crawling is a straightforward process of visiting all sites on a systematic basis.

  8. Affine cipher - Wikipedia

    en.wikipedia.org/wiki/Affine_cipher

    The affine cipher is a type of monoalphabetic substitution cipher, where each letter in an alphabet is mapped to its numeric equivalent, encrypted using a simple mathematical function, and converted back to a letter.

  9. Sahih al-Bukhari - Wikipedia

    en.wikipedia.org/wiki/Sahih_al-Bukhari

    As is the norm in hadith studies, Bukhari would have recited his Sahih to a large number of his students who would not only listen to it, but memorise it word for word from him and copy it in its entirety. Students would then check their own copies against Bukhari’s personal copy and would only receive permission to transmit and teach once ...