System Revolution, the forerunner of Mac OS

 Now Apple is the Luxury item. Apple run the closed source Operating System called Mac OS, so we as user can not tooling hardware and software freely Windows OS. That is maintaining the authenticity of Mac OS till now. But do you know history that Mac OS first name is not Mac OS. It just called System.

 

Here is the history of System Revolution, the forerunner of Mac OS

 

System 1.0
When the first Mac OS was released, his name is not Mac OS .. but it is often simply called System. 
On January 24, 1984, Apple released the System 1.0 operating system .. The first Operating System is the forerunner of  Mac OS in the future.
System 1.0 is to adopt the concept of the Xerox Alto, but many GUI elements it is made by Apple itself, such as the menu bar, pop up menu, drag and drop and direct manipulation. You could say that System 1.0 is the operating system that introduces the GUI (Graphical User Interface), which at the time was still not popular because most computers still use the command line.
System 1.0 can only run one application only in one time, in other words .. she was not able to do multitasking. In May 5, 1984, Apple released the System 1.1 by Finder 1.1.

System 2.0 
System 2.0 introduced Apple in April 1985. Equipped with a 4.1 and MiniFinder Finder to open applications quickly. It also introduced the system taking screenshots using Command + Shift + 3. In System 2.0, the user can shutdown computer through the menu provided.

System 3.0/3.1/3.2
Apple released this version in January 1986. System 3.0 comes along with the introduction of his Mac Plus. Equipped with Finder 5.1, System 3.0 is able to run faster than the previous version. This is because the existing System 3.0 Disk Cache technology which will keep the activities that are often performed in memory. One month later System 3.1 was released. Continued System 3.2 in June 1986 and System 3.3 on January 1987. 

System 4.0/4.1 
Apple releases System 4.0 with Finder 5.4 in March 1987. In addition to bug fixes, no changes were too significant at this 4.0 system. System 4.0 can only be run on a Mac with 512 KB of RAM or more.
Surprisingly only 1 months ago, Apple released another System 4.1 with Finder 5.5. More strangely again, system 4.1 can only be run on a Mac with 1MB of RAM or more. 

System 4.2 (System Software 5.0)
This is where the confusion occurs name. In October 1987 Apple released System 4.2 with Finder 6.0. But they called System Software 5. Finally, many are calling this operating system as the System 5. In this version, copy and paste can be done more easily with equipped progress bar and cancel button.
In System Software 5 was also the first time that Apple introduced with the release MultiFinder Multitasking feature.One month later, November 1987 Apple released the System 4.3 with Finder 6.0. Or many call as the System Software 1.5

System 6.0 
Apple released System 6  in June 1988. This is an operating system made ​​more stable and long term. System 6 was able to run rapidly and be able to run Floppy Disk with only 300-400 MB RAM only, leaving plenty of RAM to run other applications.

System 7.0/7.5/7.5.3
On May 13, 1991, Apple released the systems 7.0 with significant changes. Adding a variety of new applications, improved stability and new features. System 7.0 gives freedom to users to open many apps as long as there are remaining memory. In this version users can also share files on your hard drive over the network.
In January 1995, Apple released System 7.5 and continued with System 7.5.3 in May 1996.