|Company / developer||Be Inc.|
|Source model||Closed source|
|Latest stable release||R5.0.3 [±]|
|Latest unstable release||PR2 (October 1997) [±]|
|Supported platforms||IA-32, PowerPC|
|Kernel type||Modular Hybrid kernel|
BeOS is an operating system for personal computers first developed by Be Inc. in 1991. It was first written to run on BeBox hardware. BeOS was built for digital media work and was written to take advantage of modern hardware facilities such as symmetric multiprocessing by utilizing modular I/O bandwidth, pervasive multithreading, preemptive multitasking and a 64-bit journaling file system known as BFS. The BeOS GUI was developed on the principles of clarity and a clean, uncluttered design.
BeOS was positioned as a multimedia platform which could be used by a substantial population of desktop users and a competitor to Mac OS and Microsoft Windows. However, it was ultimately unable to achieve a significant market share and proved commercially unviable for Be Inc. The company was acquired by Palm Inc. and today BeOS is mainly used and developed by a small population of enthusiasts.
BeOS was optimized for digital media work and was written to take advantage of modern computer hardware facilities such as symmetric multiprocessing by utilizing modular I/O bandwidth, pervasive multithreading, preemptive multitasking and a 64-bit journaling file system known as BFS. The BeOS GUI was developed on the principles of clarity and a clean, uncluttered design.
The API was written in C++ for ease of programming. It has partial POSIX compatibility and access to a command-line interface through Bash, although internally it is not a Unix-derived operating system.
Initially designed to run on AT&T Hobbit-based hardware, BeOS was later modified to run on PowerPC-based processors: first Be's own systems, later Apple Inc.'s PowerPC Reference Platform and Common Hardware Reference Platform, with the hope that Apple would purchase or license BeOS as a replacement for its then aging Mac OS. Apple CEO Gil Amelio started negotiations to buy Be Inc., but negotiations stalled when Be CEO Jean-Louis Gassée wanted $200 million; Apple was unwilling to offer any more than $125 million. Apple's board of directors decided NeXTSTEP was a better choice and purchased NeXT in 1996 for $429 million, bringing back Apple co-founder Steve Jobs.
In 1997, Power Computing began bundling BeOS (on a CD for optional installation) with its line of PowerPC-based Macintosh clones. These systems could dual boot either the Mac OS or BeOS, with a start-up screen offering the choice. 
Due to Apple's moves and the mounting debt of Be Inc., BeOS was soon ported to the Intel x86 platform with its R3 release in March 1998.  Through the late 1990s, BeOS managed to create a niche of followers, but the company failed to remain viable. Be Inc. Also released a stripped-down, but free, copy of BeOS R5 known as BeOS Personal Edition (BeOS PE). BeOS PE could be started from within Microsoft Windows or Linux, and was intended to nurture consumer interest in its product and give developers something to tinker with.  Be Inc. also released a stripped-down version of BeOS for Internet Appliances (BeIA), which soon became the company's business focus in place of BeOS. 
In 2001 Be's copyrights were sold to Palm, Inc. for some $11 million. BeOS R5 is considered the last official version, but BeOS R5.1 "Dano", which was under development before Be's sale to Palm and included the BeOS Networking Environment (BONE) networking stack, was leaked to the public shortly after the company's demise. 
In 2002, Be Inc. sued Microsoft claiming that Hitachi had been dissuaded from selling PCs loaded with BeOS, and that Compaq had been pressured not to market an Internet appliance in partnership with Be. Be also claimed that Microsoft acted to artificially depress Be Inc.'s initial public offering (IPO). The case was eventually settled out of court for $23.25 million with no admission of liability on Microsoft's part.
After the split from Palm, PalmSource used parts of BeOS's multimedia framework for its failed Palm OS Cobalt product. With the takeover of PalmSource, the BeOS rights now belong to Access Co. 
Continuation and clones
In the years that followed the demise of Be Inc. a handful of projects formed to recreate BeOS or key elements of the OS with the eventual goal of then continuing where Be Inc. left off. This was facilitated by the fact that Be Inc. realesed some components of BeOS under a free licence. Here is a list of these projects:
- BlueEyedOS: It uses a modified version of the Linux kernel which allows it to run Beos applications. It is free and open source software. There have been no releases since 2003. 
- Cosmoe: A user interface for Linux that can run most BeOS applications. It is free and open source software. The last release was in 2004 and its website is no longer online. 
- E/OS: short for Emulator Operating System. A Linux and FreeBSD-based operating system that aimed to run Windows, DOS, AmigaOS and BeOS applications. It is free and open source software.  Active development ended in July 2008.
- Haiku: A complete reimplementation of BeOS not based on Linux. It is free and open source software. The first alpha release, "Haiku R1 / Alpha 1", was released on September 14, 2009. The second alpha release, "Haiku R1 / Alpha 2", was made available on May 9, 2010, and the third alpha release, "Haiku R1 / Alpha 3", on June 18, 2011. "Haiku R1 / Alpha 4" was released November 12, 2012. As of 2014, it is the only BeOS clone still under development.
Zeta was a commercially available operating system based on the BeOS R5.1 codebase. Originally developed by yellowTAB, the operating system was then distributed by magnussoft. During development by yellowTAB, the company received criticism from the BeOS community for refusing to discuss its legal position with regard to the BeOS codebase (perhaps for contractual reasons). Access Co. (which bought PalmSource, until then the holder of the intellectual property associated with BeOS) has since declared that yellowTAB had no right to distribute a modified version of BeOS, and magnussoft has ceased distribution of the operating system. 
|DR1–DR5||October 1995||AT&T Hobbit|
|DR6 (developer release)||January 1996||PowerPC|
|Advanced Access Preview Release||May 1997|
|PR1 (preview release)||June 1997|
|R3||March 1998||PowerPC and Intel x86|
|R4||November 4, 1998|
|R4.5 ("Genki")||June 1999|
|R5 PE/Pro ("Maui")||March 2000|
|R5.1 ("Dano")||November 2001||Intel x86|
Products using BeOS
BeOS (and now Zeta) continue to be used in media appliances such as the Edirol DV-7 video editors from Roland corporation which run on top of a modified BeOS and the TuneTracker radio automation software that runs on BeOS and Zeta, but is also sold as a "Station-in-a-Box" with the Zeta operating system included.
The Tascam SX-1 digital audio recorder runs a heavily modified version of BeOS that will only launch the recording interface software. 
Final Scratch, a 12″ vinyl timecode record-driven DJ software/hardware system, was first developed on BeOS. The "ProFS" version was sold to a few dozen DJs prior to the 1.0 release, which ran on a Linux virtual partition. 
- Haiku (operating system)
- Access Co.
- Comparison of operating systems
- Gobe Productive
- Hitachi Flora Prius
- List of BeOS programs
- Pe (text editor)
- "Haiku Release 1 Alpha 4", Haiku-OS.org, November 12, 2012.
- Tom (2004-11-24). "BeOS @ MaCreate". Archived from the original on 2005-03-24. Retrieved 2006-11-16.
- Owen W. Linzmayer (1999). "Apple Confidential: The Day They Almost Decided To Put Windows NT On The Mac Instead Of OS X!". Mac Speed Zone. Retrieved 18 January 2014.
- "Be Newsletters, Volume 1: 1995-1996". HaikuOS. Be Inc. 1996. Retrieved 18 January 2014.
- "Be Newsletters, Volume 3: 1998". Haiku OS. Be Inc. 1998. Retrieved 18 January 2014.
- "Be Newsletters, Volume 5: 2000". Haiku OS. Be Inc. 2000. Retrieved 18 January 2014.
- "BeOS/Zeta". YellowBites. YellowBites. Retrieved 18 January 2014.
- "Be Newsletters, Volume 5: 2000". Haiku OS. Be Inc. 2000. Retrieved 18 January 2014.
- "Be Newsletters, Volume 5 : 2000". Haiku OS. Be Inc. 2000. Retrieved 18 January 2014.
- Jake Daniels (23 January 2001). "More Information on the BeOS Dano Version". OSNews. OSNews. Retrieved 18 January 2014.
- Andrew Orlowski (2002-02-20). "Be Inc. sues Microsoft". Archived from the original on 20 April 2008. Retrieved 2008-04-24.
- Mark Berniker (2003-09-08). "Microsoft Settles Anti-Trust Charges with Be". Retrieved 2008-04-24.
- PalmSource Introduces Palm OS Cobalt, PalmSource press release, 10 February 2004.
- ACCESS Completes Acquisition of PalmSource, ACCESS press release, November 14, 2005.
- "Welcome to BlueEyedOS". BlueEyedOS. BlueEyedOS. 26 June 2003. Retrieved 18 January 2014.
- "The Cosmoe Operating System". Internet Archive. Cosmoe. 2 June 2011. Retrieved 18 January 2014.
- "Free BeOS and BeOS Clones". The Free Country. The Free Country. 30 November 2009. Retrieved 18 January 2014.
- "Haiku Project Announces Availability of Haiku R1/Alpha 1". 2009-09-14.
- "Haiku Project Announces Availability of Haiku R1/Alpha 2". 2010-05-09.
- "Haiku Release 1 Alpha 3", Haiku-OS.org, June 18, 2011.
- Haiku Release 1 Alpha 4, November 12, 2011, work=Haiku-OS.org
- "Zeta Operating System". Operating System.org. Operating System.org. 14 October 2013. Retrieved 18 January 2014.
- "EDIROL by Roland DV-7DL Series Digital Video Workstations". Archived from the original on 2006-11-10. Retrieved 2006-11-16.
- "TuneTracker Radio Automation Software". Archived from the original on 14 November 2006. Retrieved 2006-12-09.
- "Professional Audio Coming to Haiku?". Haikuware. Haikuware. 6 September 2011. Retrieved 18 January 2014.
- "iZ RADAR 24". Archived from the original on 27 December 2006. Retrieved 2006-12-27.
- Jay Ankeney (2006-05-01). "Technology Showcase: Digital Signage Hardware". Digital Content Producer. Retrieved 2006-12-09.
- Peter Kirn (28 April 2008). "Ni Ends Legal Dispute Over Traktor Scratch; Digital Vinyl's Twisty, Turny History". Create Digital Music. Create Digital Music. Retrieved 18 January 2014.
- The Dawn of Haiku, by Ryan Leavengood, IEEE Spectrum May 2012, p 40-43,51-54.
- BeOS 5.0 (Personal Edition) as a free download (Most likely to be documented for early 2000-01 hardware.)
- Mirror of the old www.be.com site
- BeOS Celebrating Ten Years
- BeGroovy A blog dedicated to all things BeOS
- BeOS: The Mac OS X might-have-been, reghardware.co.uk
- Programming the Be Operating System: An O'Reilly Open Book (out of print, but can be downloaded)
- BeOS Developer Video