Operating System and Computer Security What does Operating System do Manages all the resource in a computer (including processor, memory, i/o devices)
Provides an interface between the hardware and application software. Mostly used OSDesktop
Unix/Linux and their siblings.
Embedded Linux OS
Macintosh Operating SystemEvolved from 1984’s original MacOS
1984 Mac was first commercial computer with Graphical User Interface (GUI) and mouse
Currently MacOS 9, MacOS X
Inventor of trash can, alias (shortcut), pull-down menus, etc.Evolution is progressive change or improvement Mac OS DetailsControl Strip
Alias (same as shortcut)
Single-button Mouse (can be customized)
Sherlock 2 (global search utility, copied in Windows 2000 and Windows ME)
Easy to use, hard to troubleshoot Windows OSWindows is built on top of MS-DOS, the MicroSoft-Disk-Operating-System, based QDOS.
Windows 1.0 very delayed, very poor quality
Windows 3.1 (c. 1992) first usable version, still very limited in comparison to MacOS 6
Windows 95 revolutionary for Intel based computers, but, just a copy of Mac OSRevolution is non-progressive change, major drastic change ...