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Lecture Introduction to computing - Lecture 3

This lesson gives you a glimpse inside a standard desktop computer and introduces you to its most important parts. You will learn how these components work together and allow you to interact with the system. You also will discover the importance of software, without which a computer could do nothing. Finally, you will see that the user is (in most cases, at least) an essential part of a complete computer system. | CSC 101 Introduction to Computing Lecture 3 Dr. Iftikhar Azim Niaz ianiaz@comsats.edu.pk 1 2 Last Lecture Summary I Developments in Microcomputers From 1984 to 2008 Intel, AMD, Motorola, IBM, Apple, Microsoft Internet Computer for Individual Use Desktop Computers Workstations Notebook computers Tablet computers Handheld computers Smart phone 2 3 Last Lecture Summary II Computer for Organizations Network servers Mainframes Minicomputers Supercomputers Computers in Society Home Education Small business Industry Government Health Care 3 Looking Inside Computer System Most people believe that computers must be extremely complicated devices, because they perform such amazing tasks Computer is a collection of parts, which are categorized according to the kinds of work they do Glimpse inside a standard desktop computer How these components work together and allow you to interact with the system 4 4 Parts of the Computer System Computer systems have four parts Hardware Software Data User 5 5 Hardware Mechanical devices in the computer Anything that can be touched e.g. printer, keyboard, PDA etc. consists of interconnected electronic devices that you can use to control the computer’s operation, input, and output. generic term device refers to any piece of hardware 6 6 Software Set of instructions that makes the computer perform tasks Tell the computer what to do Also called a program Thousands of programs exist Some for computer’s own use Some for the service of the user Reason majority of the people would want to purchase a computer E-mail, type letters, play games etc. 7 7 Data Pieces of information / individual facts By themselves do not make much sense Computers organize and present data 8 8 Teaching tip A good exercise to relate the importance of making data meaningful is to list some random numbers on the board. Then ask what they mean. Without a title, the numbers have no meaning. Once a title is presented, the numbers make sense. Users People operating the . | CSC 101 Introduction to Computing Lecture 3 Dr. Iftikhar Azim Niaz ianiaz@comsats.edu.pk 1 2 Last Lecture Summary I Developments in Microcomputers From 1984 to 2008 Intel, AMD, Motorola, IBM, Apple, Microsoft Internet Computer for Individual Use Desktop Computers Workstations Notebook computers Tablet computers Handheld computers Smart phone 2 3 Last Lecture Summary II Computer for Organizations Network servers Mainframes Minicomputers Supercomputers Computers in Society Home Education Small business Industry Government Health Care 3 Looking Inside Computer System Most people believe that computers must be extremely complicated devices, because they perform such amazing tasks Computer is a collection of parts, which are categorized according to the kinds of work they do Glimpse inside a standard desktop computer How these components work together and allow you to interact with the system 4 4 Parts of the Computer System Computer systems have four parts Hardware Software Data User 5