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Grand/LATTC station

Grand/LATTC is an at-grade light rail station on the A Line of Los Angeles Metro Rail. It is located in South Los Angeles, it is served by the J Line, whose stops are located west of the station on Flower and Figueroa streets. The station is located in the median of Washington Boulevard west of Grand Avenue, has a center platform. One of the station's exits leads directly to the Los Angeles Trade–Technical College and is used by students. A Line service hours are from 4:00 AM until 1:00 AM daily. Los Angeles Trade Technical College Grand Olympic Auditorium Mount St. Mary's College - Doheny campus St. Vincent de Paul Roman Catholic Church Lanterman High School Traffic Court Orthopaedic Hospital Grand station Metro website

Darwin (operating system)

Darwin is an open-source Unix-like operating system first released by Apple Inc. in 2000. It is composed of code developed by Apple, as well as code derived from NeXTSTEP, BSD, other free software projects. Darwin forms the core set of components upon which macOS, iOS, watchOS, tvOS, iPadOS are based, it is POSIX-compatible, but has never, by itself, been certified as compatible with any version of POSIX. Starting with Leopard, macOS has been certified as compatible with the Single UNIX Specification version 3; the heritage of Darwin began with NeXT's NeXTSTEP operating system, first released in 1989. After Apple bought NeXT in 1997, it announced it would base its next operating system on OPENSTEP; this was developed into Rhapsody in 1997, Mac OS X Server 1.0 in 1999, Mac OS X Public Beta in 2000, Mac OS X 10.0 in 2001. In 1999 Apple announced it would release the Mach 2.5 microkernel, BSD Unix 4.4 OS, the Apache Web server components of Mac OS X Server. At the time interim CEO Steve Jobs alluded to British naturalist Charles Darwin by announcing "because it's about evolution".

In 2000, the core operating system components of Mac OS X were released as open-source software under the Apple Public Source License as Darwin. Up to Darwin 8.0.1, Apple released a binary installer after each major Mac OS X release that allowed one to install Darwin on PowerPC and Intel x86 systems as a standalone operating system. Minor updates were released as packages. Darwin is now only available as source code, except for the ARM variant, which has not been released in any form separately from iOS, watchOS, or tvOS. A hobbyist developer winocm took the official Darwin source code and ported it to ARM; the kernel of Darwin is XNU, a hybrid kernel which uses OSFMK 7.3 from the OSF, various elements of FreeBSD, an object-oriented device driver API called I/O Kit. The hybrid kernel design provides the flexibility of a microkernel and the performance of a monolithic kernel. Darwin includes support for the 64-bit x86-64 variant of the Intel x86 processors used in Macs and the 64-bit ARM processors used in the iPhone 5S, the 6th generation iPod Touch, the iPad Air, the fourth generation Apple TV, original HomePod, models, as well as the 32-bit ARM processors used in the iPhone 5C and older, earlier generations of the iPod Touch, the iPad up to the fourth generation, the second and third generation Apple TV.

An open-source port of the XNU kernel exists that supports Darwin on Intel and AMD x86 platforms not supported by Apple, though it does not appear to have been updated since 2009. An open-source port of the XNU kernel exists for ARM platforms. Older versions supported some or all of 32-bit PowerPC, 64-bit PowerPC, 32-bit x86, it supports the POSIX API by way of its BSD lineage and a large number of programs written for various other UNIX-like systems can be compiled on Darwin with no changes to the source code. Darwin does not include many of the defining elements of macOS, such as the Carbon and Cocoa APIs or the Quartz Compositor and Aqua user interface, thus cannot run Mac applications, it does, support a number of lesser known features of macOS, such as mDNSResponder, the multicast DNS responder and a core component of the Bonjour networking technology, launchd, an advanced service management framework. In July 2003, Apple released Darwin under version 2.0 of the Apple Public Source License, which the Free Software Foundation classifies as a free software license incompatible with the GNU General Public License.

Previous versions were released under an earlier version of the APSL license, which did not meet the FSF definition of free software, although it did meet the requirements of the Open Source Definition. The following is a table of major Darwin releases with their dates of release and their corresponding macOS releases. Note that the corresponding macOS release may have been released on a different date; the jump in version numbers from Darwin 1.4.1 to 5.1 with the release of Mac OS X v10.1.1 was designed to tie Darwin to the Mac OS X version and build numbering system, which in turn is inherited from NeXTSTEP. In the build numbering system of macOS, every version has a unique beginning build number, which identifies what whole version of macOS it is part of. Mac OS X v10.0 had build numbers starting with 4, 10.1 had build numbers starting with 5, so forth. The command uname -r in Terminal will show the Darwin version number, the command uname -v will show the XNU build version string, which includes the Darwin version number.

Due to the free software nature of Darwin, there have been projects that aim to modify or enhance the operating system. OpenDarwin was a community-led operating system based on the Darwin system, it was founded in April 2002 by Internet Systems Consortium. Its goal was to increase collaboration between the free software community. Apple benefited from the project because improvements to OpenDarwin would be incorporated into Darwin releases. On July 25, 2006, the OpenDarwin team announced that the project was shutting down, as they felt OpenDarwin had "become a mere hosting facili