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Darwin integrates a number of technologies, most importantly the Mach 3.0 kernel, operating system services based on 4.4 BSD (Berkeley Software Distribution, particularly FreeBSD), high-performance networking facilities, and support for multiple integrated file systems.
Originally developed at Carnegie Mellon University, the Mach kernel manages all the tasks and processes the computer runs. Apple's Head of Software Engineering, Dr. Avie Tevanian, worked on the Mach kernel at Carnegie-Mellon. Mac OS X owes no small part of its existence to Avie Tevanian. The Mach kernel gives Mac OS X features such as protected memory and symmetric multiprocessing.
Currently Darwin is built for both Apple's PowerPC architecture as well as for the Intel architecture, though the latter only has very limited driver support.
The Darwin developers decided to take a mascotFor the suburb of Sydney, Australia, see Mascot, New South Wales . For the American city, see Mascot, Tennessee . A mascot is some thing, typically an animal or human character used to represent a group with a common identity, such as a school, profession in 2000. HexleyHexley is the mascot of the open source operating system, DarwinOS, which is the core of Mac OS X. Hexley is a cartoon platypus that usually wears a cap which resembles a daemon's horns and carries a pitchfork. Hexley was designed and copyrighted by Jon H the platypus was chosen over other contenders, such as an AquaAqua is a trade name for the GUI appearance of Apple Computer's Mac OS X operating system. Aqua, as its name suggests, is based around the theme of water, with droplet-like buttons and other elements, and liberal use of transparency and reflection effects Darwin fishThe Darwin fish is a parody of the ichthys, the "Jesus fish". It is an ichthys that has "evolved" legs (and optionally, has the word "Darwin" written inside). It is a symbol for the scientific theory of evolution. Most Darwin fish are plastic and chrome a, Clarus the DogcowThe Dogcow is a bitmapped image first introduced by Apple Computer. It is the shape of a female dog with nose and spots that look like a cow, originally created in 1983 as part of the Cairo font by Susan Kare as the glyph for 'z'. The image of the dogcow, and an orcaOrcas" is also the codename for Microsoft Visual Studio. The Orca Orcinus orca is the largest member of the dolphin family. It is the second-most widely distributed mammal on Earth after humans, and is found in all the world's oceans. It is also a versati. Apple does not sanction Hexley as a logo for Darwin.
In April 2002, the ISCThe Internet Systems Consortium (ISC is an organization that was founded by Rick Adams and Paul Vixie with funding from UUNET to develop and support a number of reference implementations of internet software. Software currently developed at the ISC includ and Apple founded OpenDarwin.org, a community to foster cooperative Darwin development. OpenDarwinOpenDarwin is a freely available, multi-platform BSD- and Mach 3. 0-based UNIX-like operating system. It is available for the PowerPC architecture and for the IA32 architecture. The mascot of OpenDarwin is Hexley the platypus. The current version of OpenD creates its own releases of the Darwin OS. The most famous subproject of OpenDarwin is DarwinPorts, whose goal is to create a next-generation collection of ports to Darwin (and also, over the long term, the other BSD Unices and Solaris).
In July 2003, Apple released Darwin under version 2.0 of the APSL license, which the Free Software Foundation approved as a free software license. Previous releases had been under an earlier version of the APSL that did not meet the FSF's definition of free software, although it met the requirements of the Open Source Definition.