Doom became a " killer app " that all capable consoles and operating systems were expected to have, and versions of Doom have subsequently been released for the following systems: DOS, Microsoft Windows, Linux, Apple Macintosh, Super NES, Sega 32X, Sony PlayStation, Game Boy Advance, iOS, Symbian OS, RISC OS, Atari Jaguar, Sega Saturn, Nintendo 64, Tapwave Zodiac, 3DO, Xbox, and Xbox Live Arcade.

Apple also made changes to applications: they resume in the same state as they were before they were closed ( similar to iOS ).

Apple purchased NeXT on December 20, 1996 for $ 429 million and 1. 5 million shares of Apple stock, and much of the current OS X and iOS operating systems are built on the OPENSTEP foundation.

* Apple iTunes, used on Mac OS X and Microsoft Windows to sync iOS devices ( such as the iPhone and iPod touch )

Apple iOS devices, like the iPhone, iPod Touch, and iPad, can use Apple's MobileMe subscription service to synchronize calendar, address book, mail account, Internet bookmark, and other data with one or more Macintosh or Windows computers using Wi-Fi or cellular data connections.

( Other UNIX implementations built on top of the Mach kernel are NeXTSTEP, MkLinux Mac OS X and Apple iOS.

The Apple iOS operating system used on the iPhone, iPad and iPod Touch uses VoiceOver speech synthesis for accessibility.

Chez-Maze is a chess based game of challenging puzzles developed for ' Apple ' products based on iOS.

A keen fisherman, Tarrant launched the Fishing with Chris Tarrant application for the Apple Inc. iPhone and other iOS devices in August 2010, in association with Angling Times magazine.

Safari is a web browser developed by Apple Inc. and included with the Mac OS X and iOS operating systems.

On June 11, 2012, Apple released a developer preview of Safari 6. 0 with a feature called iCloud Tabs, which allows users to ' sync ' their open tabs with any iOS or other OS X device running the latest software.

In June 2010, Apple introduced iOS 4, which included APIs to allow third-party applications to multitask, and the iPhone 4, with an improved display and back-facing camera, a front-facing camera for videoconferencing, and other improvements.

Along with the iPhone 4S Apple also released iOS 5 and iCloud, untethered device activation, backup, and synchronization, along with additional features.

These include those based on Linux, such as Google's Android, Nokia's Maemo, Hewlett-Packard's webOS, and those based on BSD, such as the Darwin-based Apple iOS.

On June 15, 2010, Apple released an Apple Store app for iOS.

On September 20, 2012, Swiss and world media reported that the design of this clock was illegally copied without prior permission by Apple Inc. for its use as the iOS 6 clock application on the iPad.

On Apple iOS devices, you can press and hold " n " or " N " on the touch screen.

In mobile platform-oriented Unixen such as Apple iOS and Android, the device's security systems must be cracked in order to obtain superuser access.

At an Apple media event on March 7, 2012 Tim Cook announced a new version of iPhoto for use on the iOS mobile operating system .. iPhoto for iOS was made available that day on the App Store for $ 4. 99 alongside the already-released iMovie and GarageBand for iOS.

iOS features a mobile version of Apple Mail with added ActiveSync support, though it is still missing the functionality of attaching files to reply emails.

Unlike other hobbyist computers of its day, which were sold as kits, the Apple I was a fully assembled circuit board containing about 60 + chips.

The second incarnation was a much smaller unit the width of two 5¼ " floppy drives stacked on top of each other, and the third incarnation looked like a flattened Apple with a built-in keyboard.

Powering the system was an Atari SALLY 6502 ( Atari's slightly custom 6502, sometimes described as a " 6502C ") processor running at 1. 79 MHz, similar to the processor found in home computers ( Atari 8-bit, Apple II, Commodore 64 ) and other consoles ( Atari 5200 and Nintendo Entertainment System ).

The objection regards any additional analytic work of the mind as a synthesis of other experiences that is incapable of logically revealing any true essence of Apple.

" From here we're headin ' for The Big Apple ," proudly replied the other.

By the late 1920s, New York writers other than Fitz Gerald were starting to use " Big Apple " and were using it outside of a horse-racing context.

Soon there was an all-out price war involving Commodore, TI, Atari and practically every vendor other than Apple Computer.

By the mid-1990s, Compaq's price war had enabled it to overtake IBM and Apple, while other IBM PC Compatible manufacturers such as Packard Bell and AST were driven from the market.

Mature versions of the Commodore, SWTPC, Atari and Apple home computer systems all featured a disk operating system ( actually called ' DOS ' in the case of the Commodore 64 ( CBM DOS ), Atari 800 ( Atari DOS ), and Apple II machines ( Apple DOS )), as did ( at the other end of the hardware spectrum, and much earlier ) IBM's System / 360, 370 and ( later ) 390 series of mainframes ( e. g., DOS / 360: Disk Operating System / 360 and DOS / VSE: Disk Operating System / Virtual Storage Extended ).

Microsoft had worked with Apple Computer to develop Desk Accessories and other minor pieces of software that were included with early Macintosh system software.

Version 2. 03, and later 3. 0, faced challenges from Apple over its overlapping windows and other features Apple charged mimicked the ostensibly copyrighted " look and feel " of its operating system and " embodie and generated a copy of the Macintosh " in its OS.

Although this market segment is now much reduced, the technologies developed in this area continue to be influential on the Internet and in both Linux and Apple Mac OS X networking — and the TCP / IP protocol has now almost completely replaced IPX, AppleTalk, NBF, and other protocols used by the early PC LANs.

The most popular computers such as the Apple II and IBM PC had published schematic diagrams and other documentation which permitted rapid reverse-engineering and third-party replacement motherboards.

The Apple IIGS used a digital sound chip designed for the Ensoniq Mirage synthesizer, and later models used a custom sound system and upgraded processors, which drove other companies to improve their own offerings.

The original Macintosh system software was partially based on the Lisa OS, previously released by Apple for the Lisa computer in 1983 and, as part of an agreement allowing Xerox to buy shares in Apple at a favorable rate, it also used concepts from the Xerox PARC Xerox Alto, which Steve Jobs and several other Macintosh team members had previewed.

Mach 3 led to a number of efforts to port other operating systems parts for the microkernel, including IBM's Workplace OS and several efforts by Apple Computer to build a cross-platform version of the Mac OS.

For several years, new PowerBook and PowerBook Duo computers were introduced which featured incremental improvements, including color screens, but by mid-decade, most other companies had copied the majority of the PowerBook's features, and Apple was unable to regain their lead.

Apple, IBM, Microsoft and other companies also sponsor their own certification examinations.

Mike Paquette, one of the authors of Quartz, explained why Apple did not move from Display PostScript to X, and chose instead to develop its own window server, by saying that once Apple added support for all the features it wanted to include into X11, it would not bear much resemblance to X11 nor be compatible with other servers anyway.

AppleTalk was released for the original Macintosh in 1985, and was the primary protocol used by Apple devices through the 1980s and 90s.

This eventually leads to the practice of indexing, which is used by almost every operating system from Windows to the system that operates Apple iPod devices.

* Accelerometers in consumer electronics devices such as game controllers ( Nintendo Wii ), personal media players / cell phones ( Apple iPhone, various Nokia mobile phone models, various HTC PDA models ) and a number of Digital Cameras ( various Canon Digital IXUS models ).

In 2010 a new paid version was released for the Apple iPhone and iPad, making use of those devices ' multi-touch capabilities.

It is used in a number of systems such as most Android-based systems, the Apple iPhone and iPad, RIM devices, Nintendo Game Boy Advance and Nintendo DS, etc.

Affected devices include Apple iPhone, HTC EVO4G, LG Thrill, Research in Motion Torch, Samsung Galaxy S and Galaxy S II, and Sony Xperia Play smartphones.

Unfortunately, when mixing and matching Apple and non-Apple 10BASE2 devices, there were many seemingly natural configurations of cables and connectors which would cause the network to become unreliable or unusable in the area, reducing the value of the complex and proprietary Apple 10BASE2 wiring system.

The Zoomer failed commercially, but Palm managed to survive through selling synchronization software for HP devices, and the Graffiti handwriting recognition software for the Apple Newton MessagePad.

* GeneXus: A Windows Rapid Software Development Solution for Cross-Platform application creation and deployment based on knowledge representation and supporting C #, Cobol, Java including Android and BlackBerry smart devices, Objective-C for Apple mobile devices, RPG, Ruby, Visual Basic, and Visual FoxPro.

** Newton devices running the Newton OS, also from Apple

* Apple II accelerators, hardware devices design to speed up an Apple II computer

Apple's iTunes software can be used to transfer music to the devices from computers using certain versions of Apple Macintosh and Microsoft Windows operating systems.

Apple Desktop Bus ( ADB ) is a bit-serial computer bus connecting low-speed devices to computers.

* Complete hardware specification of ADB devices and protocol ( Apple Guide to the Macintosh Family Hardware )

* Apple Desktop Bus, a bit-serial computer bus for connecting low-speed devices to computers

Some early microcomputing devices such as the Apple II sometimes required the end-user to physically cut some wires and solder others together to make configuration changes.

* In 2005, the Federal Court of Appeal overruled a 2003 Copyright Board decision which had applied the blank media levy to MP3 players such as Apple Inc .' s iPod, on the basis that such devices did not qualify as " audio recording medium " as per the Copyright Act definition.

The browser is currently available for Apple mobile devices and on desktops.

On February 22, 2010, WGN-TV became the first television station in the Chicago market to allow iPhone users to watch live streams of its newscasts ; the 6-9 a. m. block of the WGN Morning News, the midday and 5 p. m. newscasts are intially available for streaming to iPhone users ; at present, all newscasts are streamed through the station's website and on Apple devices.