A multi-user dungeon (MUD) is both a style of role-playing game and the name of one of the original text-based multiplayer online role-playing games of this genre. MUD was created by Roy Trubshaw and Richard Bartle in 1980. MUD was modeled after earlier text-based adventure games and became a popular game to play over Telenet, an early commercial...
IOS is a mobile operating system for Apple-manufactured devices. iOS runs on the iPhone, iPad, iPod Touch and Apple TV.
iOS is best known for serving as the underlying software that allows iPhone users to interact with their phones using gestures such as swiping, tapping and pinching. These finger actions are typically performed on multitouch capacitive touch screen displays, which provide fast response and accept inputs from multiple fingers. Although it is not the No. 1 mobile OS globally, iOS dominates the North American market by a large margin, with a 60 percent market share as of May 2010.
iOS is derived from Mac OS X and is a Unix-like OS. There are four abstraction layers within iOS:
iOS comes with a lot of default apps, including an email client, a Safari Web browser, a portable media player (iPod) and the phone app.
Developers can use the iOS software development kit (SDK) to create applications for Apple mobile devices. The SDK includes tools and interfaces for developing, installing, running and testing apps. Native apps can be written using the iOS system frameworks and the Objective-C programming language. Included in the iOS SDK are Xcode Tools, which include an integrated development environment (IDE) for managing application projects, a graphical tool for creating the user interface and a debugging tool for analyzing runtime performance. It also includes an iOS simulator, which allows developers to test apps on a Mac, and an iOS developer library, which provides all the necessary documentation and reference material.
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