1. Applications of IT
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
1.3. Goverment
1.3.1. E-filing
1.3.2. E-Syariah
1.3.3. HRMIS
1.4. Health care
1.4.1. Medline
1.4.2. Counter Registration System
1.4.3. Telemedicine
1.4.4. Telesurgery
1.5. Science
1.5.1. Virtual Reality
1.5.2. Cochlear Implant
1.5.3. Hawk Eye Officiating System
1.6. Publishing
1.6.1. Online Newspaper
1.6.2. Online Magazine
1.7. Travel
1.7.1. Global Positioning System (GPS)
1.7.2. Online Reservation System
1.7.3. E-ticketing
1.8. Manufacturing
1.8.1. Compter-Aided Design
1.8.2. Computer-Aided Manufacturing
2. Categories of computer
2.1. Supercomputer
2.1.1. occupy a full room of equipment
2.1.2. tens of thousands of processors
2.1.3. extremely ;large storage (3.1 PB)
2.2. Mainframe
2.2.1. occupy a partial room of equipment
2.2.2. dozens of processors
2.2.3. very large and addable storage (4.6 TB)
2.3. Personal Computer
2.3.1. fits on a desk
2.3.2. single processor (1.5 - 2.5 Ghz)
2.3.3. large (500 GB)
2.4. Mobile Computer
2.4.1. fits on your lap
2.4.2. fits in your hand
2.5. Mobile Devices
2.5.1. fits in the palm
2.5.2. fits in your pocket
2.6. Embedded Computer
2.6.1. miniature
2.6.1.1. mounted on a circuit board and then installed in a machine or appliance using wires
3. Definition
3.1. The use of computer hardware and software to store, retrieve and manipulate data
4. Advantages
4.1. Speed
4.1.1. computers can process billions or trillions of operations in a single second
4.2. Reliability
4.2.1. electronis components in computers are dependable and reliable because they rarely break
4.3. Consistency
4.3.1. acomputer with same input will produce same results consistently
4.4. Communication
4.4.1. computers can communicate wirelessly with other computers
4.5. Storage
4.5.1. computers can store enormous amounts of data and make this available for processing anytime needed
5. Disadvantages
5.1. Violaton of privacy
5.1.1. other person might steal our personal and confidential records if they were not protected properly
5.2. Public safety
5.2.1. we might be a victim to crime if we are exposing or sharing out photos, videos or other personal information publicly
5.3. Impact on labour force
5.3.1. many employees might be jobless if their skills have been replaced by computers
5.4. Health risks
5.4.1. prolonged or improper use of computer can lead to health injuries
5.4.2. behavioral health risks are computers addiction and technology overload\
5.5. Impact on enviroment
5.5.1. computers manufacturing process and computers waste can lead to pollution