NeXTSTEP

NeXTNeXT DPSNeXTStep 1.0
NeXTSTEP is a discontinued object-oriented, multitasking operating system based on UNIX.wikipedia
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NeXT

NeXT ComputerNeXT Inc.NeXT Software
It was developed by NeXT Computer in the late 1980s and early 1990s and was initially used for its range of proprietary workstation computers such as the NeXTcube.
Nevertheless, their innovative object-oriented NeXTSTEP operating system and development environment (Interface Builder) were highly influential.

NeXTcube

Cube
It was developed by NeXT Computer in the late 1980s and early 1990s and was initially used for its range of proprietary workstation computers such as the NeXTcube.
The workstation runs the NeXTSTEP operating system and was launched with a US$10000 list price.

TextEdit

TextEdit application
Many bundled macOS applications, such as TextEdit, Mail, and Chess, are descendants of NeXTSTEP applications.
TextEdit is a simple, open-source word processor and text editor, first featured in NeXT's NeXTSTEP and OpenStep.

Shelf (computing)

ShelfShelving System
It introduced the idea of the Dock (carried through OpenStep and into today's macOS) and the Shelf.
The Shelf is an interface feature in NeXTSTEP and OPENSTEP, and is used as a repository to store links to commonly used files, directories and programs, and as a temporary "holding" place to move/copy files and directories around in the file system hierarchy.

Apple Mail

MailMail (Apple)Mail (OS X)
Many bundled macOS applications, such as TextEdit, Mail, and Chess, are descendants of NeXTSTEP applications.
Apple Mail grew out of NeXTMail, which was originally developed by NeXT as part of its NeXTSTEP operating system, after Apple's acquisition of NeXT in 1997.

Apple Inc.

AppleApple ComputerApple Inc
After the purchase of NeXT by Apple, it became the source of the popular operating systems macOS, iOS, watchOS, and tvOS.
After numerous failed attempts to modernize Mac OS, first with the Pink project from 1988 and later with Copland from 1994, Apple in 1997 purchased NeXT for its NeXTSTEP operating system and to bring Steve Jobs back.

Operating system

operating systemsOScomputer operating system
NeXTSTEP is a discontinued object-oriented, multitasking operating system based on UNIX.
Steve Jobs, a co-founder of Apple Inc., started NeXT Computer Inc., which developed the NEXTSTEP operating system.

Services menu

servicesservice menusystem service
NeXTSTEP also originated or innovated a large number of other GUI concepts which became common in other operating systems: 3D "chiseled" widgets, large full-color icons, system-wide drag and drop of a wide range of objects beyond file icons, system-wide piped services, real-time scrolling and window dragging, properties dialog boxes called "inspectors", and window modification notices (such as the saved status of a file).
The concept originated in the NeXTSTEP operating system, from which it was carried over into macOS and GNUstep.

Doom (1993 video game)

DoomThe Ultimate DoomUltimate Doom
It was also the platform on which Tim Berners-Lee created the first web browser, and on which id Software developed the video games Doom and Quake.
Development was done on NeXT computers running the NeXTSTEP operating system.

Enterprise Objects Framework

EOF
These include Portable Distributed Objects (PDO), which allow easy remote invocation, and Enterprise Objects Framework, a powerful object-relational database system.
The Enterprise Objects Framework, or more commonly simply EOF, was introduced by NeXT in 1994 as a pioneering object-relational mapping product for its NeXTSTEP and OpenStep development platforms.

Objective-C

Objective-C++Objective CCategory
It was later selected as the main language used by NeXT for its NeXTSTEP operating system, from which macOS and iOS are derived.

NeXT Computer

NeXTNeXT Computer SystemNeXT Inc.
A preview release of NeXTSTEP (version 0.8) was shown with the launch of the NeXT Computer on October 12, 1988.
Its NeXTSTEP operating system is based on the Mach and BSD-derived Unix, with a proprietary GUI using a Display PostScript-based back end.

Tim Berners-Lee

Sir Tim Berners-LeeTim Berners LeeTimothy Berners-Lee
It was also the platform on which Tim Berners-Lee created the first web browser, and on which id Software developed the video games Doom and Quake.
His software also functioned as an editor (called WorldWideWeb, running on the NeXTSTEP operating system), and the first Web server, CERN HTTPd (short for Hypertext Transfer Protocol daemon).

Object-oriented operating system

object-orientedobject-oriented systems
NeXTSTEP is a discontinued object-oriented, multitasking operating system based on UNIX.

Lotus Improv

Improv
The modern "Notebook" interface for Mathematica, and the advanced spreadsheet Lotus Improv, were developed using NeXTSTEP.
Lotus Improv is a discontinued spreadsheet program from Lotus Development released in 1991 for the NeXTSTEP platform and then for Windows 3.1 in 1993.

OpenStep

OPENSTEP EnterpriseOPENSTEP/MachOPENSTEP for Mach
It introduced the idea of the Dock (carried through OpenStep and into today's macOS) and the Shelf. Based upon the "OPENSTEP for Mach" operating system, and developing the OPENSTEP API to become Cocoa, Apple created the basis of Mac OS X, and eventually, in turn, of iOS, watchOS, and tvOS.
OpenStep is a defunct object-oriented application programming interface (API) specification for a legacy object-oriented operating system, with the basic goal of offering a NeXTSTEP-like environment on non-NeXTSTEP operating systems.

Hexen: Beyond Heretic

HexenHexen: Deathkings of the Dark CitadelWarpHexen
Other games based on the Doom engine such as Heretic and its sequel Hexen by Raven Software as well as Strife by Rogue Entertainment were also developed on NeXT hardware using id's tools.
Like Heretic, Hexen was developed on NeXTSTEP.

MacOS

Mac OS XOS XMac
It introduced the idea of the Dock (carried through OpenStep and into today's macOS) and the Shelf. After the purchase of NeXT by Apple, it became the source of the popular operating systems macOS, iOS, watchOS, and tvOS. Based upon the "OPENSTEP for Mach" operating system, and developing the OPENSTEP API to become Cocoa, Apple created the basis of Mac OS X, and eventually, in turn, of iOS, watchOS, and tvOS.
There, the Unix-like NeXTSTEP operating system was developed, and then launched in 1989.

Taskbar

Docksystem traynotification area
It introduced the idea of the Dock (carried through OpenStep and into today's macOS) and the Shelf.
The Dock, as featured in macOS and its predecessor NeXTSTEP, is also a kind of taskbar.

NeXTstation

later machinesstation
It runs the NeXTSTEP operating system.

GNUstep

A free software implementation of the OpenStep standard, GNUstep, also exists.
The roots of the GNUstep application interface are the same as the roots of Cocoa: NeXTSTEP and OpenStep.

Heretic (video game)

HereticHeretic: Shadow of the Serpent RidersAmiHeretic
Other games based on the Doom engine such as Heretic and its sequel Hexen by Raven Software as well as Strife by Rogue Entertainment were also developed on NeXT hardware using id's tools.
Like Doom, Heretic was developed on NeXTSTEP.

Mach (kernel)

MachMach kernelMach microkernel
Implementations of that standard were released for Sun's Solaris, Windows NT, and NeXT's version of the Mach kernel.
Mach 2.5 was also selected for the NeXTSTEP system and a number of commercial multiprocessor vendors.

Display PostScript

DisplayPostscriptDPS
The user-space windowing system library NeXTSTEP used PostScript to draw items like titlebars and scrollers.

Cocoa (API)

CocoaCocoa APIYellow Box
Based upon the "OPENSTEP for Mach" operating system, and developing the OPENSTEP API to become Cocoa, Apple created the basis of Mac OS X, and eventually, in turn, of iOS, watchOS, and tvOS.
Cocoa continues the lineage of several software frameworks (mainly the App Kit and Foundation Kit) from the NeXTSTEP and OpenStep programming environments developed by NeXT in the 1980s and 1990s.