MIDI is a technical standard that describes a communications protocol, digital interface, electrical connectors that connect a wide variety of electronic musical instruments and related audio devices for playing and recording music. A single MIDI link through a MIDI cable can carry up to sixteen channels of information, each of which can be routed to a separate device or instrument; this could be sixteen different digital instruments, for example. MIDI carries event messages, data that specify the instructions for music, including a note's notation, velocity, panning to the right or left of stereo, clock signals; when a musician plays a MIDI instrument, all of the key presses, button presses, knob turns and slider changes are converted into MIDI data. One common MIDI application is to play a MIDI keyboard or other controller and use it to trigger a digital sound module to generate sounds, which the audience hears produced by a keyboard amplifier. MIDI data can be recorded to a sequencer to be edited or played back.
A file format that stores and exchanges the data is defined. Advantages of MIDI include small file size, ease of modification and manipulation and a wide choice of electronic instruments and synthesizer or digitally-sampled sounds. A MIDI recording of a performance on a keyboard could sound like a piano or other keyboard instrument. A MIDI recording is not an audio signal, as with a sound recording made with a microphone. Prior to the development of MIDI, electronic musical instruments from different manufacturers could not communicate with each other; this meant that a musician could not, for example, plug a Roland keyboard into a Yamaha synthesizer module. With MIDI, any MIDI-compatible keyboard can be connected to any other MIDI-compatible sequencer, sound module, drum machine, synthesizer, or computer if they are made by different manufacturers. MIDI technology was standardized in 1983 by a panel of music industry representatives, is maintained by the MIDI Manufacturers Association. All official MIDI standards are jointly developed and published by the MMA in Los Angeles, the MIDI Committee of the Association of Musical Electronics Industry in Tokyo.
In 2016, the MMA established the MIDI Association to support a global community of people who work, play, or create with MIDI. In the early 1980s, there was no standardized means of synchronizing electronic musical instruments manufactured by different companies. Manufacturers had their own proprietary standards to synchronize instruments, such as CV/gate and Digital Control Bus. Roland founder Ikutaro Kakehashi felt the lack of standardization was limiting the growth of the electronic music industry. In June 1981, he proposed developing a standard to Oberheim Electronics founder Tom Oberheim, who had developed his own proprietary interface, the Oberheim System. Kakehashi felt the system was too cumbersome, spoke to Sequential Circuits president Dave Smith about creating a simpler, cheaper alternative. While Smith discussed the concept with American companies, Kakehashi discussed it with Japanese companies Yamaha and Kawai. Representatives from all companies met to discuss the idea in October.
Using Roland's DCB as a basis and Sequential Circuits engineer Chet Wood devised a universal synthesizer interface to allow communication between equipment from different manufacturers. Smith proposed this standard at the Audio Engineering Society show in November 1981; the standard was discussed and modified by representatives of Roland, Korg and Sequential Circuits. Kakehashi favored the name Universal Musical Interface, pronounced you-me, but Smith felt this was "a little corny". However, he liked the use of "instrument" instead of "synthesizer", proposed the name Musical Instrument Digital Interface. Moog Music founder Robert Moog announced MIDI in the October 1982 issue of Keyboard. At the 1983 Winter NAMM Show, Smith demonstrated a MIDI connection between Prophet 600 and Roland JP-6 synthesizers; the MIDI specification was published in August 1983. The MIDI standard was unveiled by Kakehashi and Smith, who received Technical Grammy Awards in 2013 for their work; the first MIDI synthesizers were the Roland Jupiter-6 and the Prophet 600, both released in 1982.
1983 saw the release of the first MIDI drum machine, the Roland TR-909, the first MIDI sequencer, the Roland MSQ-700. The first computers to support MIDI were the NEC PC-88 and PC-98 in 1982, the MSX released in 1983. MIDI's appeal was limited to professional musicians and record producers who wanted to use electronic instruments in the production of popular music; the standard allowed different instruments to communicate with each other and with computers, this spurred a rapid expansion of the sales and production of electronic instruments and music software. This interoperability allowed one device to be controlled from another, which reduced the amount of hardware musicians needed. MIDI's introduction coincided with the dawn of the personal computer era and the introduction of samplers and digital synthesizers; the creative possibilities brought about by MIDI technology are credited for helping revive the music industry in the 1980s. MIDI introduced capabilities. MIDI sequencing makes it possible for
Windows Media Player
Windows Media Player is a media player and media library application developed by Microsoft, used for playing audio and viewing images on personal computers running the Microsoft Windows operating system, as well as on Pocket PC and Windows Mobile-based devices. Editions of Windows Media Player were released for classic Mac OS, Mac OS X and Solaris but development of these has since been discontinued. In addition to being a media player, Windows Media Player includes the ability to rip music from and copy music to compact discs, burn recordable discs in Audio CD format or as data discs with playlists such as an MP3 CD, synchronize content with a digital audio player or other mobile devices, enable users to purchase or rent music from a number of online music stores. Windows Media Player replaced an earlier application called Media Player, adding features beyond simple video or audio playback. Windows Media Player 11 is available for Windows XP and included in Windows Vista and Windows Server 2008.
The default file formats are Windows Media Video, Windows Media Audio, Advanced Systems Format, its own XML based playlist format called Windows Playlist. The player is able to utilize a digital rights management service in the form of Windows Media DRM. Windows Media Player 12 is the most recent version of Windows Media Player, it was released on October 22, 2009 along with Windows 7 and has not been made available for previous versions of Windows or has it been updated since for Windows 8, Windows 8.1 and Windows 10. These versions of Windows instead use Groove Music and Microsoft Movies & TV as the default playback applications for most media. Windows RT does not run Windows Media Player; the first version of Windows Media Player appeared in 1991, when Windows 3.0 with Multimedia Extensions was released. Called Media Player, this component was included with "Multimedia PC"-compatible machines but not available for retail sale, it was capable of playing.mmm animation files, could be extended to support other formats.
It used MCI to handle media files. Being a component of Windows, Media Player shows the same version number as that of the version Windows with which it was included. Microsoft continually produced new programs to play media files. In November of the following year, Video for Windows was introduced with the ability to play digital video files in an AVI container format, with codec support for RLE and Video1, support for playing uncompressed files. Indeo 3.2 was added in a release. Video for Windows was first available as a free add-on to Windows 3.1, integrated into Windows 95 and Windows NT 4.0. In 1995, Microsoft released ActiveMovie with DirectX Media SDK. ActiveMovie incorporates a new way of dealing with media files, adds support for streaming media. In 1996, ActiveMovie was renamed DirectShow. However, Media Player continued to come with Windows until Windows XP, in which it was renamed Windows Media Player v5.1. In 1999, Windows Media Player's versioning broke away from that of Windows itself.
Windows Media Player 6.4 came as an out-of-band update for Windows 95, Windows 98 and Windows NT 4.0 that co-existed with Media Player and became a built-in component of Windows 2000, Windows ME and Windows XP with an mplayer2.exe stub allowing to use this built-in instead of newer versions. Windows Media Player 7.0 and its successors came in the same fashion, replacing each other but leaving Media Player and Windows Media Player 6.4 intact. Windows XP is the only operating system to have three different versions of Windows Media Player side by side. All versions branded. Windows Media Player version 7 was a large revamp, with a new user interface and increased functionality. Windows Vista, dropped older versions of Windows Media Player in favor of v11. Beginning with Windows Vista, Windows Media Player supports the Media Foundation framework besides DirectShow. Windows Media Player 12 was released with Windows 7, it added new features. With Windows 8, the player did not receive an upgrade. On April 16, 2012, Microsoft announced that Windows Media Player would not be included in Windows RT, the line of Windows designed to run on ARM based devices.
Windows Media Player supports playback of audio and pictures, along with fast forward, file markers and variable playback speed. It supports streaming playback with multicast streams and progressive downloads. Items in a playlist can be skipped over temporarily at playback time without removing them from the playlist. Full keyboard-based operation is possible in the player. Windows Media Player supports full media management, via the integrated media library introduced first in version 7, which offers cataloguing and searching of media and viewing media metadata. Media can be arranged according to album, genre, date et al. Windows Media Player 9 Series introduced Quick Access Panel to browse and navigate the entire library through a menu; the Quick Access Panel was added to the mini mode in version 10 but was removed in version 11. WMP 9 Series introduced ratings and Auto Ratings. Windows Media Player 10 introduced support for aggregating pictures, Recorded TV shows, other media into the library.
Windows Mobile is a discontinued family of mobile operating systems developed by Microsoft for smartphones and Pocket PCs. Its origin dated back to Windows CE in 1996, though Windows Mobile itself first appeared in 2000 as PocketPC 2000, it was renamed "Windows Mobile" in 2003, at which point it came in several versions and was aimed at business and enterprise consumers. It became one of the most popular mobile operating systems as of the mid-2000s, but its popularity faded in the following years, by February 2010, facing competition from rival mobile OSs, including Apple's iOS and Android, Microsoft announced Windows Phone to supersede Windows Mobile; as a result, Windows Mobile has been deprecated. Windows Phone is incompatible with software; the last version of Windows Mobile, released after the announcement of Windows Phone, was 6.5.5. After this, Microsoft ceased development on Windows Mobile, in order to concentrate on Windows Phone. Most versions of Windows Mobile have a standard set of features, such as multitasking and the ability to navigate a file system similar to that of Windows 9x and Windows NT, including support for many of the same file types.
To its desktop counterpart, it comes bundled with a set of applications that perform basic tasks. Internet Explorer Mobile is the default web browser, Windows Media Player is the default media player used for playing digital media; the mobile version of Microsoft Office, is the default office suite. Internet Connection Sharing, supported on compatible devices, allows the phone to share its Internet connection with computers via USB and Bluetooth. Windows Mobile supports virtual private networking over PPTP protocol. Most devices with mobile connectivity have a Radio Interface Layer; the Radio Interface Layer provides the system interface between the Cell Core layer within the Windows Mobile OS and the radio protocol stack used by the wireless modem hardware. This allows OEMs to integrate a variety of modems into their equipment; the user interface changed between versions, only retaining similar functionality. The Today Screen called the Home Screen, shows the current date, owner information, upcoming appointments, e-mails, tasks.
The taskbar display the current time as well as the volume level. Devices with a cellular radio show the signal strength on said taskbar. Windows Mobile is based on the Windows CE kernel and first appeared as the Pocket PC 2000 operating system, it includes a suite of basic applications developed with the Microsoft Windows API, is designed to have features and appearance somewhat similar to desktop versions of Windows. It allowed third party developers to develop software for Windows Mobile with no restrictions imposed by Microsoft. Software applications were purchasable from Windows Marketplace for Mobile during the service's lifespan. Most early Windows Mobile devices came with a stylus, which can be used to enter commands by tapping it on the screen; the primary touch input technology behind most devices were resistive touchscreens which required a stylus for input. Devices used capacitive sensing which does not require a stylus. Along with touchscreens, a large variety of form factors existed for the platform.
Some devices featured slideout keyboards. Microsoft's work on handheld portable devices began with research projects in 1990, with the work on Windows CE beginning in 1992; the OS and the user interface were developed separately. With Windows CE being based on Windows 95 code and a separate team handing the user interface, codenamed WinPad. Windows 95 had strong pen support making porting easy, it is treating pens right for the first time." WinPad was delayed due to price and performance issues, before being scrapped in early 1995 due to touchscreen driver problems relating to WriteTouch technology, made by NCR Microelectronic Products. Although WinPad was never released as a consumer product, Alpha builds were released showcasing many interface elements. During development of WinPad a separate team worked on a project called Pulsar; this project was canceled around the same time as WinPad. The two disbanded groups would form the Pegasus project in 1995. Pegasus would work on the hardware side of the Windows CE OS, attempting to create a form factor similar to a PC-esque PDA like WinPad, with communications functionality like Pulsar.
A hardware reference guide was created and devices began shipping in 1996, although most of these device bore little resemblance to the goal of a pen-based touchscreen handheld device. Pocket PC 2000 codenamed "Rapier", was released on April 19, 2000, was based on the Windows CE 3.0 kernel. It was the debut of what was dubbed the Windows Mobile operating system, meant to be a successor to the operating system aboard Palm-Size PCs, it retained backwards compatibility with such Palm-Size PC applications. Pocket PC 2000 was intended for Pocket PC devices. While, several Pocket PC 2000 phones were released, Microsoft's smartphone hardware platform was not yet created; the only resolution supported by this release was 240×320. Removable storage card formats that were supported were MultiMediaCard. At this time Pocket PC devices had not been standardized with a specific CPU architecture; as a result, Pocket PC 2000 was released on multiple CPU architectures. Infrared File beaming capability was amo
Samsung i607 BlackJack
The Samsung BlackJack, or Samsung SGH-i607, is a smartphone, available through AT&T in the United States and Telstra in Australia. Specifications from the Samsung website: Screen resolution: 320 x 240 px, 2.25 inches Input method: QWERTY keypad Operating System: Windows Mobile 5.0 Processor: 220 MHz Texas Instruments OMAP 1710 Storage: External microSD slot Flash Memory: 64 MB RAM, 128 MB ROM Modes: Quad-band GSM Data connection: 3G and 2G Bluetooth 2.0 1.3 megapixel camera that can take photographs and videos Picture resolutions: 1280 x 960, 640 x 480, 320 x 240, 176 x 144 Video resolutions: 320 x 240, 176 x 144 2X digital zoom Self timer Brightness level adjustment Plays MP3, WMV, MP4 and 3GP media formats Battery: Removable 3.7 Volt Lithium-ion, 1,200 mAh, up to 5.5 hours of talk time and up to 11 days of standby Size: 4.45×2.32×0.4 inches Weight: 3.5 ounces In January 2007 Research In Motion, creators of the BlackBerry handhelds, filed suit in United States federal court claiming the BlackJack trademark was too similar to the BlackBerry mark.
They alleged that Samsung had named their smartphone with a word beginning with "Black" just to mislead the customers that would come to the cellphone stores with the intention to purchase a BlackBerry. A month the two parties settled out of court. In January 2008, Rogers Wireless and Fido Solutions released the Blackjack II in Canada under the name Jack. For handsets manufactured between November 2006 and February 2007, there is a known defect in the antenna assembly, causing a large number of dropped calls; the successor to the BlackJack was the Samsung BlackJack II. It was available in the U. S. for AT&T and in Canada for Rogers. Award Winner from CTIA. "Best hardware from Smartphone/PDA category." Winner of comparison review from ` RIM BlackBerry 8800' by Cnet. Official Samsung Blackjack site Phone information on Samsung website Phone information on Phonescoop Reviews: MobileTechReview, CNET, PC Magazine Samsung "Jack" featured in PCWorld.ca's round-up of 3 Weeks Review of Newest Samsung Galaxy S8|date=Nov 2019 |bot=InternetArchiveBot |fix-attempted=yes }} Samsung Blackjack support
Microsoft Silverlight is a deprecated application framework for writing and running rich Internet applications, similar to Adobe Flash. A plugin for Silverlight is still available for some browsers. While early versions of Silverlight focused on streaming media versions supported multimedia and animation and gave developers support for CLI languages and development tools. Silverlight was one of the two application development platforms for Windows Phone, but web pages that use Silverlight did not run on the Windows Phone or Windows Mobile versions of Internet Explorer, as there was no Silverlight plugin for Internet Explorer on those platforms. From the initial launch in 2007, reviewers compared the product to Adobe's Flash. According to statowl.com, Microsoft Silverlight had a penetration of 64.2% in May 2011. Usage on July 2010 was 53.6%, whereas as of May 2011 market leader Adobe Flash was installed on 95.3% of browsers, Java was supported on 76.5% of browsers. Support of these plugins is not mutually exclusive.
Not all Web sites require a browser plugin. Silverlight was used to provide video streaming for the NBC coverage of the 2008 Summer Olympics in Beijing, the 2010 Winter Olympics in Vancouver, the 2008 conventions for both major United States political parties. Silverlight was used by Amazon Video and Netflix for their instant video streaming services, but Netflix said in its Tech Blog in 2013 that, since Microsoft had announced Silverlight's end-of-life, they would be moving to HTML5 video. Industry observers were announcing the death of Silverlight as early as 2011, Internally proponents of the technology thought Extensible Application Markup Language as a concept was a bad idea from the start. In 2012 Microsoft deprecated Silverlight for HTML5 in Windows 8, - but as late as the beginning of 2015 it was not clear what Microsoft's official position was on the future for Silverlight as a technology. In July of 2015 a Microsoft blog post clarified matters: "...we encourage companies that are using Silverlight for media to begin the transition to DASH/MSE/CENC/EME based designs".
Microsoft has set the overall support end date for Silverlight 5 to be October 2021. Support for IE7-8 was removed between 2014-2016, depending on the OS. Support for IE9-11 will last until late 2021, depending on the OS, "or though the support lifecycle of the underlying browsers, whichever is shorter." There is no Silverlight plugin available for Microsoft Edge.. It is no longer supported by Google Chrome since September 2015, by Firefox since March 2017; as of February 2018, fewer than 0.1% sites used Silverlight, 5.3% used Adobe Flash, 2.4% used Java. Silverlight provides a retained mode graphics system similar to Windows Presentation Foundation, integrates multimedia, graphics and interactivity into a single run-time environment. In Silverlight applications, user interfaces are declared in Extensible Application Markup Language and programmed using a subset of the. NET Framework. XAML can be used for marking up the vector animations. Silverlight can be used to create Windows Sidebar gadgets for Windows Vista.
Silverlight supports H.264 video, Advanced Audio Coding, Windows Media Video, Windows Media Audio, MPEG Layer III media content across all supported browsers without requiring Windows Media Player, the Windows Media Player ActiveX control, or Windows Media browser plug-ins. Because Windows Media Video 9 is an implementation of the Society of Motion Picture and Television Engineers VC-1 standard, Silverlight supports VC-1 video. According to the end user license agreement VC-1 and H.264 are only licensed for the "personal and non-commercial use of a consumer". Silverlight makes it possible to dynamically load Extensible Markup Language content that can be manipulated through a Document Object Model interface, a technique, consistent with conventional Ajax techniques. Silverlight exposes a Downloader object which can be used to download content, like scripts, media assets, or other data, as may be required by the application. With version 2, the programming logic can be written in any. NET language, including some derivatives of common dynamic programming languages like IronRuby and IronPython.
A free software implementation named Moonlight, developed by Novell in cooperation with Microsoft, was released to bring Silverlight versions 1 and 2 functionality to Linux, FreeBSD, other open source platforms, although some Linux distributions did not include it, citing redistribution and patent concerns. However, in May 2012, Moonlight was abandoned because of its lack of popularity. Over the course of about five years Microsoft released five versions with varying platform support: The first version was released in 2007, it is compatible with versions of Internet Explorer web browser on Microsoft Windows operating systems, with Safari on Apple macOS, with mobile devices using the Windows Mobile and Symbian platforms. Cross platform Mozilla Firefox support for Silverlight was removed in Firefox 52 released in March 2017 when Mozilla removed support for NPAPI plugins, bringing it in-line with the removal of NPAPI plugin support in Google Chrome. Silverlight requires an x86 processor with Streaming SIMD Extensions support.
Supported processors include the Intel Pentium III and up, the AMD Athlon XP and up, newer AMD Durons. The following table presents an availability and compatibility matrix of Silverlight versions for various operating systems and web browsers. Support for Opera was promised since M
Mobile operating system
A mobile operating system is an operating system for phones, smartwatches, or other mobile devices. While computers such as typical laptops are'mobile', the operating systems used on them are not considered mobile ones, as they were designed for desktop computers that did not have or need specific mobile features; this distinction is becoming blurred in some newer operating systems that are hybrids made for both uses. Mobile operating systems combine features of a personal computer operating system with other features useful for mobile or handheld use. By Q1 2018, over 383 million smartphones were sold with 86.2 percent running Android and 12.9 percent running iOS. Android alone is more popular than the popular desktop operating system Windows, in general smartphone use outnumber desktop use. Mobile devices with mobile communications abilities contain two mobile operating systems – the main user-facing software platform is supplemented by a second low-level proprietary real-time operating system which operates the radio and other hardware.
Research has shown that these low-level systems may contain a range of security vulnerabilities permitting malicious base stations to gain high levels of control over the mobile device. Mobile operating systems have majority use since 2017, thus traditional desktop OS is now a minority used kind of OS. However, variations occur in popularity by regions, while desktop-minority applies on some days in regions such as United States and United Kingdom. 9294029091 Mobile operating system milestones mirror the development of mobile phones and smartphones: 1973–1993 – Mobile phones use embedded systems to control operation. 1993 – Apple launch Newton OS running on their Newton series of portable computers. 1994 – The first smartphone, the IBM Simon, has a touchscreen, PDA features. 1996 – Palm Pilot 1000 personal digital assistant is introduced with the Palm OS mobile operating system. 1998 – Symbian Ltd. has developed Symbian OS. Symbian was used by many major mobile phone brands, above all by Nokia.
1999 – Nokia S40 Platform is introduced along with the Nokia 7110. 2000 – Symbian becomes the first modern mobile OS on a smartphone with the launch of the Ericsson R380. 2001 – The Kyocera 6035 is the first smartphone with Palm OS. 2002 Microsoft's first Windows CE smartphones are introduced. BlackBerry releases its first smartphone. 2005 – Nokia introduces Maemo OS on the first Internet tablet N770. 2007 Apple iPhone with iOS is introduced as an iPod, "mobile phone" and "Internet communicator". Open Handset Alliance formed by Google, HTC, Dell, Motorola, Samsung, LG, etc. 2008 – OHA releases Android 1.0 with the HTC Dream as the first Android phone. 2009 Palm introduces webOS with the Palm Pre. By 2012, webOS devices were discontinued. Samsung announces the Bada OS with the introduction of the Samsung S8500. November – Windows Phone OS phones are released but are not compatible with the prior Windows Mobile OS. July – MeeGo, a mobile Linux distribution, combining Maemo and Moblin, is introduced with the Nokia N9, a collaboration of Nokia and Linux Foundation.
September Apple releases iOS 9. Google releases Android 6.0 "Marshmallow". October – On October 26, BlackBerry announced that there are no plans to release new APIs and software development kits for BlackBerry 10, future updates would focus on security and privacy enhancements only. November – Microsoft releases Windows 10 Mobile. February – Microsoft released Windows 10 Mobile Anniversary Update. June – Apple announced iOS 10. August – Google posted the Fuchsia source code on GitHub. August – Google released Android 7.0 "Nougat". September – Apple released iOS 10. November – Tizen released Tizen 3.0. November – BlackBerry released BlackBerry 10.3.3. April – Samsung offic
Microsoft Corporation is an American multinational technology company with headquarters in Redmond, Washington. It develops, licenses and sells computer software, consumer electronics, personal computers, related services, its best known software products are the Microsoft Windows line of operating systems, the Microsoft Office suite, the Internet Explorer and Edge web browsers. Its flagship hardware products are the Xbox video game consoles and the Microsoft Surface lineup of touchscreen personal computers; as of 2016, it is the world's largest software maker by revenue, one of the world's most valuable companies. The word "Microsoft" is a portmanteau of "microcomputer" and "software". Microsoft is ranked No. 30 in the 2018 Fortune 500 rankings of the largest United States corporations by total revenue. Microsoft was founded by Bill Gates and Paul Allen on April 4, 1975, to develop and sell BASIC interpreters for the Altair 8800, it rose to dominate the personal computer operating system market with MS-DOS in the mid-1980s, followed by Microsoft Windows.
The company's 1986 initial public offering, subsequent rise in its share price, created three billionaires and an estimated 12,000 millionaires among Microsoft employees. Since the 1990s, it has diversified from the operating system market and has made a number of corporate acquisitions, their largest being the acquisition of LinkedIn for $26.2 billion in December 2016, followed by their acquisition of Skype Technologies for $8.5 billion in May 2011. As of 2015, Microsoft is market-dominant in the IBM PC-compatible operating system market and the office software suite market, although it has lost the majority of the overall operating system market to Android; the company produces a wide range of other consumer and enterprise software for desktops and servers, including Internet search, the digital services market, mixed reality, cloud computing and software development. Steve Ballmer replaced Gates as CEO in 2000, envisioned a "devices and services" strategy; this began with the acquisition of Danger Inc. in 2008, entering the personal computer production market for the first time in June 2012 with the launch of the Microsoft Surface line of tablet computers.
Since Satya Nadella took over as CEO in 2014, the company has scaled back on hardware and has instead focused on cloud computing, a move that helped the company's shares reach its highest value since December 1999. In 2018, Microsoft surpassed Apple as the most valuable publicly traded company in the world after being dethroned by the tech giant in 2010. Childhood friends Bill Gates and Paul Allen sought to make a business utilizing their shared skills in computer programming. In 1972 they founded their first company, named Traf-O-Data, which sold a rudimentary computer to track and analyze automobile traffic data. While Gates enrolled at Harvard, Allen pursued a degree in computer science at Washington State University, though he dropped out of school to work at Honeywell; the January 1975 issue of Popular Electronics featured Micro Instrumentation and Telemetry Systems's Altair 8800 microcomputer, which inspired Allen to suggest that they could program a BASIC interpreter for the device. After a call from Gates claiming to have a working interpreter, MITS requested a demonstration.
Since they didn't yet have one, Allen worked on a simulator for the Altair while Gates developed the interpreter. Although they developed the interpreter on a simulator and not the actual device, it worked flawlessly when they demonstrated the interpreter to MITS in Albuquerque, New Mexico. MITS agreed to distribute it, marketing it as Altair BASIC. Gates and Allen established Microsoft on April 4, 1975, with Gates as the CEO; the original name of "Micro-Soft" was suggested by Allen. In August 1977 the company formed an agreement with ASCII Magazine in Japan, resulting in its first international office, "ASCII Microsoft". Microsoft moved to a new home in Bellevue, Washington in January 1979. Microsoft entered the operating system business in 1980 with its own version of Unix, called Xenix. However, it was MS-DOS. After negotiations with Digital Research failed, IBM awarded a contract to Microsoft in November 1980 to provide a version of the CP/M OS, set to be used in the upcoming IBM Personal Computer.
For this deal, Microsoft purchased a CP/M clone called 86-DOS from Seattle Computer Products, which it branded as MS-DOS, though IBM rebranded it to PC DOS. Following the release of the IBM PC in August 1981, Microsoft retained ownership of MS-DOS. Since IBM had copyrighted the IBM PC BIOS, other companies had to reverse engineer it in order for non-IBM hardware to run as IBM PC compatibles, but no such restriction applied to the operating systems. Due to various factors, such as MS-DOS's available software selection, Microsoft became the leading PC operating systems vendor; the company expanded into new markets with the release of the Microsoft Mouse in 1983, as well as with a publishing division named Microsoft Press. Paul Allen resigned from Microsoft in 1983 after developing Hodgkin's disease. Allen claimed that Gates wanted to dilute his share in the company when he was diagnosed with Hodgkin's disease because he didn't think he was working hard enough. After leaving Microsoft, Allen lost billions of dollars on ill-conceived or mistimed technology investments.
He invested in low-tech sectors, sports teams, commercial real estate. Despite having begun jointly developing a new operating system, OS/2, with IBM in