The Operating System

What Is an OS?
The Government of the Computer!
Types of Operating Systems
Blinking lights, Punch Cards, the Command Line, GUI, and Multitouch
The Control Panel
Operating the Operating System
The Desktop
A visual metaphor for a workspace
Not necessarily the Microsoft variety: Another visual metaphor
Managing Files
Move those icons!
The Dialog Box
Having a conversation with your computer
User Controls
Giving commands: Menus, Toolbars, and Keyboard Shortcuts
Erasing Data
It's not what you think! (You didn't erase those photos like you thought!)
Filename Extensions
How a computer knows what program to open—and how you know which files not to!
How computers connect.