It Essentials
IT Essentials – Hand Out
Introduction to Basic Computer
What is a system?
System is a combination of components working together.
What is a computer system?
Computer System is a group of elements performing together to process data.
What is a computer?
Computer is a programmable electronic device that can store, retrieve and process data.
Three Components of a Computer
1. Hardware refers to the physical components of the computer system.
2. Software is a computer program.
3. Peopleware is the one who uses the computer.
Classification of Computers
1. Mainframes. These are characterized by large internal memory storage and a comprehensive range of software and peripheral equipment that may be connected.
2. Minicomputers. Essentially minicomputers are scaled down versions of their mainframe brothers.
They do not introduce any revolutionary hardware and software techniques and therefore the distinction between a mainframe and a mini-computer becomes blurred.
3. Microcomputers. A microcomputer is a computer with a microprocessor as its processor. A microprocessor is an integrated circuit, which can accept data and instructions from external devices.
Classification of Hardware
1. Peripheral Devices is any external device attached to the central portion of the computer.
Examples of peripherals include keyboards, monitors, printers, modems, and mice.
2. Central Processing Unit is that part of a computer that performs calculations and controls the other parts of the computer. In a PC, it is usually made up of several parts located on the motherboard. These include a master microprocessor chip and a portion of the motherboard system logic.
3. Mass Storage System is where you put the data you need immediately at hand but which would not fit into memory. Designed to hold megabytes and retrieve them at a the realm of magnetic disks, but other technologies and formats now serve specialized purposes and await their chances to move into
Introduction to Basic Computer
What is a system?
System is a combination of components working together.
What is a computer system?
Computer System is a group of elements performing together to process data.
What is a computer?
Computer is a programmable electronic device that can store, retrieve and process data.
Three Components of a Computer
1. Hardware refers to the physical components of the computer system.
2. Software is a computer program.
3. Peopleware is the one who uses the computer.
Classification of Computers
1. Mainframes. These are characterized by large internal memory storage and a comprehensive range of software and peripheral equipment that may be connected.
2. Minicomputers. Essentially minicomputers are scaled down versions of their mainframe brothers.
They do not introduce any revolutionary hardware and software techniques and therefore the distinction between a mainframe and a mini-computer becomes blurred.
3. Microcomputers. A microcomputer is a computer with a microprocessor as its processor. A microprocessor is an integrated circuit, which can accept data and instructions from external devices.
Classification of Hardware
1. Peripheral Devices is any external device attached to the central portion of the computer.
Examples of peripherals include keyboards, monitors, printers, modems, and mice.
2. Central Processing Unit is that part of a computer that performs calculations and controls the other parts of the computer. In a PC, it is usually made up of several parts located on the motherboard. These include a master microprocessor chip and a portion of the motherboard system logic.
3. Mass Storage System is where you put the data you need immediately at hand but which would not fit into memory. Designed to hold megabytes and retrieve them at a the realm of magnetic disks, but other technologies and formats now serve specialized purposes and await their chances to move into