-Explain why computer literacy is vital to success in today's world.
-Define the term, computer, and describe the relationship between data and information.
-Describe the five components of a computer.
-Discuss the advantages and disadvantages that users experience when working with computers.
-Define the term network, and identify benefits of sharing resources on a network.
-Discuss the uses of the internet and world wide web.
-Difference between software and application software.
-Differentiate among types, sites, and functions of the computers in each category.
-Describe the role of each element in a information system.
-Explain how home users, small office ,home office users ,mobile users ,power users and enterprise users each interact with computers.
-Explain how society uses computers in education , finance, government, health care, science, publishing, travel, and manufacturing.
.Computer: an electronic device for storing and processing data.
.The components of a computer: -Input device ex: scanner ,keyboard , mouse etc...
-Output device ex: printer , monitor etc...
-System unit ex: processor, memory and storage devices
-Storage device ex: optical disk drive, USB, hard desk drive etc...
-Communications device ex: modem.
.Advantages of using computers are : speed, reliability, consistency, storage, communications. while the disadvantages are : health risks, violation of privacy , public safety, and impact on labor force and environment .
.Green computing : involves reducing the courant consumed and environment waste by using a computer, and the strategies include are : - recycling
- regulating manufacturing processes
- extending computer's life
- immediately donating
Network and the internet
. Network consists of two or more computers that are linked in order to share resources, exchange files, or allow electronic communications.
.The internet is the global system of interconnected computer networks that use the Internet protocol to link billions of devices worldwide. People use the internet for a variety of reasons : research, communication ,and shop etc...
. A social networking web site : application that enables users to communicate with each other by posting information, comments, messages, images, etc.
.Software : the programs and other operating information used by a computer.
.Installing is the process of setting up software to work with the computer.
Programmer: writes programs for the operation of computer.
Categories of computers:
-Personal computer can perform all the components by itself ex: desktop computer.
-Mobile computer can be carry from place to place ex: laptop while Mobile device its a small enough and can be hold in the hand ex: phone.
-Game console: A specialized desktop computer used to play video games ex: xbox and playstation.
-Server : computer program that manages access to a centralized resource or service in a network.
-Mainframe are computers used primarily by large organizations for critical applications, bulk data processing such as census, industry and consumer statistics, enterprise resource planning, and transaction processing.
-Supercomputers is a computer that performs at or near the currently highest operational rate for computers.
- Embedded computer is a computer system with a dedicated function within a larger mechanical or electrical system, often with real-time computing constraints.(consumer electronics, home automatics device, automobiles, press controllers and robotics, computer devices and offices machines)
Elements of an information system :
- Hardware
- Software
- Data
- People
- Procedures.
Examples of computer usage:
- home user ex: personal financial
- small office/home office user ex: look up information
- mobile user ex: watches movies
- power user ex: work with multimedia
- enterprise user ex: communication among employees or blog
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