This document provides an overview of computer fundamentals including data, information, how computers work, types of computers, and information technology. It defines data as raw facts and figures and information as processed data. It describes the input, processing, and output stages of data processing. It also summarizes the different parts of a computer including the central processing unit, main memory, secondary memory, and input/output devices. Finally, it outlines the various types of computers including desktops, workstations, notebooks, tablets, handhelds, and smartphones that are used by individuals and organizations like servers, mainframes, and supercomputers.

1. Lecture 1 Computer Fundamentals

8. Data Processing Input Process Data Collection Output

17. Input Processing (Brains) Output

18. 15 5 + 10 = 15 Input Processing Output 5 10 Let us assume we are interested in calculating the sum of 5 and 10 .

19. Input Device Output Device CPU (Brains)

21. CPU and Main Memory Central Processing Unit Chip that executes program commands Intel Pentium 4 Primary storage area for programs and data that are in active use Synonymous with RAM Main Memory

22. Secondary Memory Devices Information is moved between main memory and secondary memory as needed Central Processing Unit Secondary memory devices provide long-term storage Hard disks Floppy disks ZIP disks Writable CDs Writable DVDs Tapes Main Memory Floppy Disk Hard Disk

23. Input / Output Devices Central Processing Unit I/O devices facilitate user interaction Monitor screen Keyboard Mouse Joystick Bar code scanner Touch screen Main Memory Floppy Disk Hard Disk Monitor Keyboard

31. Tablet PC

33. Personal Digital Assistant - PDA

35. Smart Phones

40. Mainframe Computers

43. Minicomputers