INTRODUCTION TO INFORMATION TECHNOLOGY
DEFINITION INFORMATION TECHNOLOGY
- use of computer hardware and software to store, retrieve & manipulate information.
ADVANTAGES
- To efficiently & effectively access and search for information via the Internet.
- Improves communication through communication technology.
- Improves data storage & file management
DISADVANTAGES:
- Security breaches (lose data to hacker or virus)
- Reduces job opportunity (Robots can replace people)
- Health risk.(when users use ear buds frequently, user can experience hearing loss)
INFORMATION TECHNOLOGY IN FIELDS & ITS APPLICATIONS:
- education
- e.g: library loan system, online tuition & E-learning website
- finance & banking
- e.g: online banking & electronic payment system
- health care
- e.g: telemedicine, telepharmacy & health care website
- science
- e.g: cochlear implants & cardiac pacemaker implants
- travel
- e.g: GPS & booking system online
- government
- e.g: E-filing & UPU online
- manufacturing
- e.g: barcode system & computer-aided system (CAD)
- publishing
- e.g: online photo printing & online card printing
CATEGORIES OF COMPUTER
DEFINITION COMPUTER
- programmable electronic devices that accepts data input, processes the data, outputs the results & stores the results.
SUPERCOMPUTER
Physical size: Full room of equipment
Speed: fastest and most powerful type of computer with thousands processors capable of processing trillions of instructions per second
Storage : Highest capacity
MAINFRAMES
Physical size : partial room to a full room of equipment.
Speed : process millions of instructions per second and handle thousands of connected computers
Storage : larger storage capacity
PERSONAL COMPUTER
Physical size : small computers fits on desk or fits on your lap
Speed : based on a microprocessor to provide computing power for home and office enviironment
Storage: from GB to TB
MOBILE COMPUTER
Physical size: computer about the size of a paper notebook to fit in one hand.
speed & storage is the same as PERSONAL COMPUTER.
MOBILE DEVICES
Physical size: very small communication devices (pocket-sized computer)
Speed: based on a microprocessor that contain built-in computing or internet capabilities
Storage: up to GB
EMBEDDED COMPUTER
Physical size: a tiny computer embedded into a product (installed in a device)
Speed: tiny specialized microprocessors
Storage: normally in KB
MOBILE COMPUTER
Physical size: computer about the size of a paper notebook to fit in one hand.
speed & storage is the same as PERSONAL COMPUTER.
MOBILE DEVICES
Physical size: very small communication devices (pocket-sized computer)
Speed: based on a microprocessor that contain built-in computing or internet capabilities
Storage: up to GB
EMBEDDED COMPUTER
Physical size: a tiny computer embedded into a product (installed in a device)
Speed: tiny specialized microprocessors
Storage: normally in KB
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