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  2. OGame - Wikipedia

    en.wikipedia.org/wiki/OGame

    OGame is a browser-based, money-management and space-war themed massively multiplayer online browser game. OGame was created in 2002 and is produced and maintained by Gameforge . [ 1 ] It is available in multiple languages, and different nationalities have their own communities.

  3. List of free massively multiplayer online games - Wikipedia

    en.wikipedia.org/wiki/List_of_free_massively...

    OGame: Gameforge Productions October 15, 2007: Windows Science-fiction strategy: Advertising-based free-to-play version. Paid subscriptions and premium benefits are also available. Build and maintain a galactic empire. Web Unknown Pirates of the Caribbean Online: Disney: October 31, 2007: Windows, Mac OS: Piracy

  4. List of open-source software for mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_open-source...

    Originally conceived in 1988 by John W. Eaton as a companion software for an undergraduate textbook, Eaton later opted to modify it into a more flexible tool. Development begun in 1992 and the alpha version was released in 1993. Subsequently, version 1.0 was released a year after that in 1994.

  5. Back-of-the-envelope calculation - Wikipedia

    en.wikipedia.org/wiki/Back-of-the-envelope...

    A back-of-the-envelope calculation is a rough calculation, typically jotted down on any available scrap of paper such as an envelope. It is more than a guess but less than an accurate calculation or mathematical proof. The defining characteristic of back-of-the-envelope calculations is the use of simplified assumptions.

  6. List of browser games - Wikipedia

    en.wikipedia.org/wiki/List_of_browser_games

    This is a selected list of multiplayer browser games.These games are usually free, with extra, payable options sometimes available. The game flow of the games may be either turn-based, where players are given a number of "turns" to execute their actions or real-time, where player actions take a real amount of time to complete.

  7. Calculator input methods - Wikipedia

    en.wikipedia.org/wiki/Calculator_input_methods

    On a single-step or immediate-execution calculator, the user presses a key for each operation, calculating all the intermediate results, before the final value is shown. [1] [2] [3] On an expression or formula calculator, one types in an expression and then presses a key, such as "=" or "Enter", to evaluate the expression.

  8. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    By 1970, a calculator could be made using just a few chips of low power consumption, allowing portable models powered from rechargeable batteries. The first handheld calculator was a 1967 prototype called Cal Tech, whose development was led by Jack Kilby at Texas Instruments in a research project to produce a portable calculator. It could add ...

  9. Programmable calculator - Wikipedia

    en.wikipedia.org/wiki/Programmable_calculator

    These BASIC dialects are optimised for calculator use, combining the advantages of BASIC and keystroke programming. They have little in common with mainstream BASIC. [4] [5] [6] The version for the Ti-89 and subsequent is more fully featured, including the full set of string and character manipulation functions and statements in standard Basic.