System 1

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System 1
Part of the Mac OS family
Developer
Apple Computer
Releases
Release to manufacturing	January 24, 1984 (1984-01-24)^{[citation needed]}
Latest stable release	1.1 (May 5, 1984 (1984-05-05))^{[citation needed]}
Source model	Closed source
License	Proprietary
Kernel type	Monolithic
Succeeded by	System 1.1, then System 2
Support status
Unsupported

System 1, also known as Macintosh System Software was the original Macintosh operating system. It is a part of the Classic Mac OS family. It ran on the 68K processor architecture of the time. It was released on January 24, 1984 along with the original Macintosh (aka Macintosh 128K) and replaced by System 1.1 on May 5, 1984.

This operating system introduced many features that would appear for years to come, some even still existing in Mac OS X.

The features of the operating system included a total lack of a command line interface (which was included in Microsoft's Windows 1.0 introduced in 1985), Finder, and the menu bar. In addition to this, it popularized the graphical user interface and desktop metaphor, which was used under license from Xerox PARC.

v t e Macintosh operating systems

Classic Mac OS (history)	System 1, 2, 3, 4, 5 System 6 System 7 Mac OS 7.6 Mac OS 8 Mac OS 9

OS X (history)	NeXTSTEP OpenStep Darwin Mac OS X Server 1.0 Public Beta v10.0 v10.1 v10.2 v10.3 v10.4 v10.5 v10.6 v10.7 v10.8 v10.9

Server	OpenStep Rhapsody OS X Server (OS X Server 1.0)

Other OS projects	A/UX Taligent Newton OS Copland MkLinux iOS

v t e Operating systems by Apple Inc.

Macintosh	Mac OS System 6 Taligent System 7 Mac OS 8 Copland Mac OS 9 A/UX Mac OS X Family Mac OS X Server Darwin Mac OS X A/ROSE Rhapsody MkLinux

Mobile	iOS Newton OS

Apple I/II/III/Lisa	ProDOS SOS Lisa OS Apple DOS GS/OS

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