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  2. Free software movement - Wikipedia

    en.wikipedia.org/wiki/Free_software_movement

    There is an agreement among most that the creation of new licenses should be minimized and those created should be made compatible with the major existing FLOSS licenses. Therefore, there was a strong controversy around the update of the GNU GPLv2 to the GNU GPLv3 in 2007, [50] [51] as the updated license is not compatible with the previous ...

  3. PDFCreator - Wikipedia

    en.wikipedia.org/wiki/Pdfcreator

    PDFCreator is an application for converting documents into Portable Document Format format on Microsoft Windows operating systems. It works by creating a virtual printer that prints to PDF files, and thereby allows practically any application to create PDF files by choosing to print from within the application and then printing to the PDFCreator printer.

  4. R (programming language) - Wikipedia

    en.wikipedia.org/wiki/R_(programming_language)

    R is a programming language for statistical computing and data visualization.It has been adopted in the fields of data mining, bioinformatics and data analysis. [9]The core R language is augmented by a large number of extension packages, containing reusable code, documentation, and sample data.

  5. Operating system - Wikipedia

    en.wikipedia.org/wiki/Operating_system

    As of September 2024, Android is the most popular operating system with a 46% market share, followed by Microsoft Windows at 26%, iOS and iPadOS at 18%, macOS at 5%, and Linux at 1%. Android, iOS, and iPadOS are mobile operating systems, while Windows, macOS, and Linux are desktop operating systems. [132]

  6. Stone Age - Wikipedia

    en.wikipedia.org/wiki/Stone_Age

    The Stone Age was a broad prehistoric period during which stone was widely used to make stone tools with an edge, a point, or a percussion surface. The period lasted for roughly 3.4 million years [ 1 ] and ended between 4000 BC and 2000 BC, with the advent of metalworking . [ 2 ]

  7. Thompson submachine gun - Wikipedia

    en.wikipedia.org/wiki/Thompson_submachine_gun

    The Annihilator, serial no. Ver 10 prototypes were similar in appearance to the later models, but without the rear sight and butt stock mounts. The Annihilator prototypes in which box magazine adapters were present, were first were fed from a 20-round box magazine, but later, the 50- and 100-round drum magazine models were developed.

  8. Four-stroke engine - Wikipedia

    en.wikipedia.org/wiki/Four-stroke_engine

    In 2005, BMW announced the development of the turbosteamer, a two-stage heat-recovery system similar to the Mack system that recovers 80% of the energy in the exhaust gas and raises the efficiency of an Otto engine by 15%. [10] By contrast, a six-stroke engine may reduce fuel consumption by as much as 40%.

  9. Galileo Galilei - Wikipedia

    en.wikipedia.org/wiki/Galileo_Galilei

    Galileo di Vincenzo Bonaiuti de' Galilei (15 February 1564 – 8 January 1642), commonly referred to as Galileo Galilei (/ ˌ ɡ æ l ɪ ˈ l eɪ oʊ ˌ ɡ æ l ɪ ˈ l eɪ /, US also / ˌ ɡ æ l ɪ ˈ l iː oʊ-/; Italian: [ɡaliˈlɛːo ɡaliˈlɛːi]) or mononymously as Galileo, was a Florentine astronomer, physicist and engineer, sometimes described as a polymath.