30 aug 2016,it rain heavily this morning.Me and lui running to the ucsi south wing bus stop taking bus to ucsi north wing .Today lecture continue teach us about computer application.

Chapter 2

Computer software

• software,also called a program,tells the computer what tasks to perform and how to perform them.
• it had two kinds of software,the software is system software and application software.
• Installing is the process of setting up software to work with the computer,printer,and other hardware.
• A programmer develops software or writes the instructions that direct the computer to process data into information.

Categories of computers

1. Personal computers 
2. Mobile computers and mobile devices
3. Game consoles
4. Servers
5. Mainframes
6. Supercomputers
7. Embedded computers

Personal Computers

• A personal computer can perform all of its input,processing,output,and storage activities by itself
• Two popular architectures are the PC and the Apple

-Desktop computer

Mobile Computers and Mobile Devices
-Mobile Computer

• Personal computer you can carry from place to place.
• Examples include notebook computers,laptop computers,netbooks,ultra-thins,and tablet PCs.

Mobile Device

• Computing device small enough to hold in your hand.
• examples include smart phones and PDAs,e-book readers,handheld computers,protable media players,and digital.

Game Consoles

• A game console is a mobile computing device designed for single-player or multiplayer video games.

Servrs

• A server controls access to the hardware,software,and other resources on a network

      -Provides a centralized storage area for programs,data,and        information


Mainframes

• A mainframe is a large,expensive,powerful computer that can handle hundreds or thousands of connected users simultaneously.

Supercomputers

• A supercomputers is the fastest, most powerful computer

-fastest supercomputer are capable of procing mre than one quadrillion instructions in a single second


EmbeddedComputers

• An embedded computer is a special-purpose computer that functions as a component in a larger product

1. Consumer Electronics-mobile and digital telephones,digital televisions,cameras,video recorders,DVD players and recorders and answering machines.
2. Home Automation Devices-thermostats,sprinkling systems,security monitoring systems,appliances and lights.
3. Automobiles-antilock brakes,engine control,airbag controller and cruise control.
4. Process Controllers and Robotics-remote monitoring systems,power monitors,machine controllers and medical devices.
5. Computer devices and Office Machines-keyboards,printer,faxes and copiers.

Elements of an Information system