history[]
System 1.0 was made by Apple for the Macintosh. it was a cheaper and lighter version of Lisa by the same company, Apple.
About it[]
it was an Graphical user interface (GUI) Operating System (OS) with a mouse, computer at the time was just text-base and don't use the mouse. but System 1 was only in Black and white now days, Operating System use GUI and Mouse and come in colours.