Operating system (OS)
set of programs containing instructions that work together to coordinate all the activities among computer and mobile device hardware.
Starting Computers and Mobile Devices
If a computer or mobile device is off, you press a power button to turn it on.
A user interface (UI)
Controls how you enter data and instructions and how information is displayed on the screen
How an operating system handles programs directly affects your productivity:
- single tasking and and multitasking
- foreground and background
- single user and multiuser
Virtual memory
Portion of a storage medium functioning as additional RAM
A driver
A small program that tells the operating system how to communicate with a specific device
Automatic update automatically provides new features or corrections to the program
Types of operating system:
Desktop operating system
A complete operating system that works on desktops, laptops, and some tablets
( windows , mac os, unix, linux)
Windows 8 offers these features:
- Start screen interface with tiles
- Includes the desktop interface
- Support for input via touch, mouse, and keyboard
- Email app, calendar app, and browser included
- Enhanced security through an antivirus program, firewall, and automatic updates
- Windows Store offers additional applications for purchase
Android
An open source, Linux-based mobile operating system designed by Google for smartphones and tablets.
iOS
Developed by Apple, is a proprietary mobile operating system specifically made for Apple’s mobile devices.
Windows Phone
Developed by Microsoft, is a proprietary mobile operating system that runs on some smartphones
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