Ishik University Introduction to IT Lecturer: Muhammed S. Anwar Email Address : muhammed.anwar@ishik.edu.iq
General Information Theory Time : 1 hour. Practical Time : 2 hours. Grading Policy: Theory %50 %15 Midterm Exam %20 Final Exam %10 Quiz’s %5 Project Practical %50 %15 Midterm Exam %20 Final Exam %10 Quiz’s %5 Project
What Is Computer ? A computer is an electronic machine. Computers take input in the form of data, process it, store it. and produce results in the form of meaningful information.
Advantages of Computers Speed Accuracy Large memory Continuous work Safety Insider information System units are commonly called cases. Many computer enthusiasts customize or ‘mod’ their cases with windows and lights. See www.casemodgod.com for examples of cases and products. Sun Microsystems makes the most popular workstations on the planet. Sun’s systems are used in diverse applications such as medical imaging and CGI (computer generated image) animation.
Limitation of the computer A computer cannot think on its own. A computer does not learn from experience. It’s work depends on the instructions by the user
The Fundamental Operation of Computer
Types of computers Computers come in various sizes and with different capabilities Supercomputer Mainframe Computers Server Computers Desktop Computers Laptop Computers Netbook Computers Palmtop computers
Supercomputer Supercomputer are the fastest computers on earth Very expensive Used for specialized applications ex.(weather forecasting)
Mainframe Computer Large ,powerful, and expensive computer many people can use it at the same time Used in large organizations like Banks
servers Servers are expensive, powerful, dependable, and dedicated computers. There are different types of servers depending on the tasks they perform Domain servers Database servers FTP servers
Desktop Computers A desktop computer is designed to be used by one person at a time. These computers are kept on the desk, so they are called desktop computers. A typical desktop computer PC consists of a system unit. , a monitor, a keyboard, and a mouse
Laptop Computers Like desktop computers, laptop computers are designed to be used by One person but, like a suitcase, these computers can easily be carried by a person anywhere.
Tablet computers Tablet PCs have touch screens with keyboards. This is the main difference between them and laptop computers
Netbook A netbook is a new type of mini and inexpensive laptop computer with a screen size of 12” or less. Netbook computers operate on an ultra low power processor. They are designed for mobility, wired and wireless online access, word processing, and general office applications. Netbooks generally do not have CD or DVD drivers.
Palmtop A personal digital assistant (PDA), also known as a palmtop computer, is a mobile device that functions as a personal information manager. Current PDAs often have the ability to connect to the Internet. A PDA has an electronic visual display, enabling it to include a web browser, but some newer models also have audio capabilities, enabling them to be used as mobile phones or portable media players. Many PDAs can access the Internet via Wi-Fi or Wireless Wide Area Network. Many PDAs employ touch screen technology. Palmtops have the least processing power