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Mac OS, which stands for Macintosh Operating System, is Apple Computer’s name for the operating systems for Macintosh computers. The original Mac OS was the first commercially successful operating system which used a graphical user interface. The Macintosh team included Bill Atkinson, Jef Raskin and Andy Hertzfeld.There are a variety of views on how the Macintosh was developed and where the underlying ideas originated. While the connection between the Macintosh and the Alto project at Xerox PARC has been established in the historical record, the earlier contributions of Ivan Sutherland's Sketchpad and Doug Engelbart's On-Line System are no less significant. See History of the GUI, and Apple v. Microsoft.
Apple deliberately played down the existence of the operating system in the early years of the Macintosh to help make the machine appear more user-friendly and to distance it from other systems such as MS-DOS, which were portrayed as arcane and technically challenging. Apple wanted Macintosh to be portrayed as a system that would "just work" when you turned it on.
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The Macintosh operating system was initially called System, as in "System 6.0.7" or " System 7System 7 (whose codename being "Big Bang", reflects on the considerable changes that came with the OS) is the term used to refer to the Mac OS that superseded the earlier versions known simply as "The System", or " System 6", and before the use of the ter". Early on it was also sometimes referred to as "the Toolbox", which consisted of a collection of standardized routines which programs could call rather than accessing the computer hardware directly. This abstractionObject-oriented programming In computer science, abstraction refers to two related, but different concepts. Software development In software development, abstraction is the process of combining multiple smaller operations into a single unit that can be re is what allowed Mac applications written for one generation of system to run on later generations: from the Mac Plus to the Mac II, to the PowerBook, to the Power Macintosh, for example. In the early days Apple deliberately obscured the existence of an operating system to distance the Mac from other systems such as MS-DOS, which were portrayed as much harder to use in comparison. Terms such "system" and "the toolbox" were handy ways to refer to operating system services and the Macintosh APIs respectively that avoided technical jargon. Until the advent of the G3G3 may refer to: PowerPC G3 iMac G3 PowerBook G3 PowerMac G3 a group of three industrialized nations consisting of Japan, the United States and Germany PowerShot G3 a Canon camera G3 Free Trade Agreement a live music show tour featuring guitarists Steve V era systems (the so-called "new world" machines), large parts of the system were held in physical ROM on the motherboard, as well as other system components on disk that supplemented, overrode or patched the ROM routines. The purpose of this was to avoid using up too much of the limited storage of floppy diskA floppy disk is a data storage device that comprises a circular piece of thin, flexible (hence "floppy") magnetic storage medium encased in a square or rectangular plastic wallet. Floppy disks are read and written by a floppy disk drive or FDD not to bes on system support, given that the early Macs had no hard diskA hard disk (or hard disc or hard drive ) is a computer storage device. Mechanics A hard disk uses rigid rotating platters. It stores and retrieves digital data from a planar magnetic surface. Information is written to the disk by transmitting an electrom. In fact only one model of Mac was ever actually bootable using the ROM alone, the 19911991 like 2002, is a palindromic year. It also has the same calendar as 2002, including Easter on March 31. It is a common year starting on Tuesday. Events January January 2 Sharon Pratt Dixon is sworn in as mayor of Washington, DC becoming the first blac Mac Classic model.
System 7.5.1 was the first to include the Mac OS logo (a blue smiley face). Mac OS 7.6 (which debuted in 1996) was the first to be named Mac OS because of the appearance of Mac "clones", workalikes from other companies such as Power Computing and Motorola, and Apple wanted to make it clear that the operating system was its own intellectual property.
The Mac OS can be divided into two families of operating systems:
- "Classic" Mac OS, the system which shipped with the first Macintosh in 1984 and its descendants, culminating with Mac OS 9 .
