1. Computer Information Systems
Computer Concepts
Computer Information Systems

2. Explain the functions of computer system components.
Describe the information processing cycle.
Describe various computer input & output devices.
Describe various auxiliary storage devices.
Describe wireless and mobile devices.
Identify basic networking components.
Course Competencies

3. Functions of Computer System Components

4. Processor Central Processing Unit (CPU) Brain of a computer
Executes program instructions
Processor

5. Memory Main Memory / Primary Storage
Used during information processing cycle
Lost when computer powers off
Memory

6. Any peripheral (piece of hardware equipment) used to provide data to the computer
Mouse, keyboard, camera, scanner
Input Devices

7. Any piece of hardware used to communicate the results of data processing
Speakers, printer, monitor
Output Devices

8. Storage Secondary Storage Not directly accessible by CPU
External hard drive, USB flash drive, memory card
Storage

9. Information Processing Cycle

10. Parts of the Information Processing Cycle
Input
Process
Storage
Output
Parts of the Information Processing Cycle

11. Role in the Information Cycle
Data is entered
Changes, computations, save for future
Communicate results
Role in the Information Cycle

12. What is the purpose of the information processing cycle as it relates to computer systems?
The main function of a computer system is to process information.

15. Input, Output, and Storage Devices

16. CD / DVD Storage device Optical disk – uses light / lasers
Often used for music, text files, and photos
Read-only vs. rewritable
CD / DVD

17. External Hard Drive Storage Stores large data sets
Connects by USB port
External Hard Drive

18. USB Flash Drive Storage device Convenient & portable Fast!
Easy to erase / rewrite
USB Flash Drive

19. Input device
Used to enter text information into the computer
Keyboard

20. Microphone Input device
Records sound & digitizes it to be stored in the computer for playback
Microphone

21. Output device
Provides a visual display from the computer
Monitor

22. Input device
Handheld pointing device that controls the on-screen cursor
Mouse

23. Printer Output device Produces a computer image on paper
InkJet vs. LaserJet
Printer

24. Input device
Images a printed page or graphic by digitizing it
Scanner

25. Output device
Converts electric current into sound format
Speakers

26. Touch Screen Input & output device
Touch-sensitive display screen on which a user can make choices by pressing button images
Touch Screen

27. Wireless & Mobile Devices

28. Wireless & Mobile Devices
Laptop
Small, mobile personal computer that runs on a single battery or AC/DC adapter
PDA
Personal Digital Assistant; used for calculations, clocks, calendars, games, Internet, , radio, etc.; characterized by touch screens
Tablet
Notebook- or Slate-shaped mobile computer; touch screen operated with a stylus or digital pen
Smartphone
Integrates the functionality of a mobile phone with a PDA
Wireless & Mobile Devices

29. Basic Networking Components

30. Computer designed to process requests and deliver data to other computers over a local network or the Internet
Central repository of data and various programs that are shared by other users in a network
Server

31. Network Interface Card (NIC)
Expansion card that enables a computer to connect to a network
Most computers now have built-in NICs
Network Interface Card (NIC)

32. Router Join multiple networks together
Able to filter traffic by analyzing IP addresses of senders and receivers
Router

33. Switch Joins multiple computers together within one local area network
Inspects data and determines the source & destination
Switch

34. Firewall Protects a computer network from unauthorized access
Also limit access to the outside from internal users
Firewall

35. Questions?

36. Exit Ticket! 3 different input devices 2 auxiliary storage devices
1 basic networking component
Exit Ticket!