1. Applications of Information Technology
1.1. Education
1.1.1. Learning Management System
1.1.2. Computer Based Training
1.2. Finance
1.2.1. Finance Investment System
1.2.2. Online Banking System
1.3. Government
1.3.1. E-Filling
1.3.2. E-Syariah
1.4. Health Care
1.4.1. Medline
1.4.2. Counter Registration System
1.5. Science
1.5.1. Vitural Reality
1.5.2. Cochlear Implant
1.6. Publishing
1.6.1. Online Newspaper & Online Magazine
1.7. Travel
1.7.1. GPS
1.7.2. E-Ticketing
1.8. Manufacturing
1.8.1. Computer-Aided Design
1.8.2. Computer Aided Manufacturing
2. Categories of Computers
2.1. Supercomputer
2.1.1. fastest and most powerful computer. capable to process more than one quadrillion instructions in a single second
2.1.2. The size occupy a full room of equipment
2.2. Mainframe
2.2.1. Large, expensive, powerful computer that can handle hundreds or thousands of connected user simultaneously
2.2.2. The size occupy partial room to a full room of equipment
2.3. Personal Computer
2.3.1. A computer that can perform all of its input, processing, output and storage activity by itself
2.3.2. the size fits on a desk
2.4. Mobile Computer and Devices
2.4.1. Mobile Computer - personal computer you can carry from place to place
2.4.1.1. the size fits on your lap or in your hand
2.4.2. Mobile Devices - computing device small enough to hold in your hand
2.4.2.1. the size fits in the palm of your hand or a pocket size
2.5. Embedded Computer
2.5.1. Special purpose computer that is function as a component in a larger product
2.5.1.1. it is a miniature
3. Definition
3.1. The use of computer, hardware and software to store, retrieve and manipulate information
4. Advantages and Disadvantages
4.1. Advantages
4.1.1. Speed - many computers can process billions or trillions of operations in a single second. Data, instructions, and information flow incredibly fast speeds.
4.1.2. Reliability - the electronic components in computers are dependable and reliable because they rarely to break
4.1.3. Consistency - a computer with the same input will produce the same results consistently
4.1.4. Communication - computers can communicate wirelessly with other computer and allow users to communicate with one another
4.1.5. Storage - computers can store enormous amounts of data and make this data available for processing anytime is needed
4.2. Disadvantages
4.2.1. Violation of privacy - other person might steal our personal and confidential records if they were not protected properly
4.2.2. Public safety - we might be a victim to crime if we are exposing or sharing out photos, videos or other personal information publicly
4.2.3. Impact on labour force - many employee might jobless if their skills have been replaced by computers
4.2.4. Health risk - Prolonged or improper computer use can lead to health injuries. Behavioral health risks are computer addiction and technology over load
4.2.5. Impact on environment - computer manufacturing process and computer waste can cause pollution