1. Computer Basics 2

2. Computer
A computer is a machine that performs 4 basic functions: Input, Processing, Output, Storage

3. Computer System
A complete working computer that has all of the necessary parts to make the computer function.
Hardware
Software

4. Hardware
The physical components of the computer. The actual equipment you can see and touch.

5. Hardware
The physical components of the computer. The actual equipment you can see and touch.

6. Hardware
Peripheral
A peripheral is an external piece of hardware that is important, but not necessary for a computer system to work.

7. Hardware
Input
Devices
Processing
Output
Devices
Storage
Devices

8. Input Devices
Hardware that enables a computer user to enter data and programs into a computer.

9. The main parts of a computer system that process information.
Processing

10. Processing
The main parts of a computer system that process information.
CPU
Central Processing Unit
The CPU is often called the “brains” of the computer.

11. Hertz Hertz measures the speed of a CPU Megahertz Gigahertz Terahertz
Hertz = number of cycles per second
Megahertz
Gigahertz
Terahertz

12. Processing
The main parts of a computer system that process information.
CPU
Central Processing Unit
The CPU is often called the “brains” of the computer.
ROM
Read Only Memory
ROM is permanent internal memory that cannot be changed.

13. The main parts of a computer system that process information.
Processing
CPU
Central Processing Unit
The CPU is often called the “brains” of the computer.
ROM is permanent internal memory that cannot be changed.
ROM
Read Only Memory
RAM
Random Access Memory
RAM is temporary memory that can be changed.

14. Output Devices
Hardware that represents data as either hard copy or soft copy after is has been processed by the computer.

15. Output Devices Monitor
Hardware that represents data as either hard copy or soft copy after is has been processed by the computer.
Monitor
Represents data as “soft copy.” Some common monitors are CRT or flat-panel.

16. Output Devices Monitor Printer
Hardware that represents data as either hard copy or soft copy after is has been processed by the computer.
Monitor
Represents data as “soft copy.” Some common monitors are CRT or flat-panel.
Printer
Represents data as “hard copy.” Some common printers are laser or inkjet.

17. Output Devices Monitor Printer Speakers
Hardware that represents data as either hard copy or soft copy after is has been processed by the computer.
Monitor
Represents data as “soft copy.” Some common monitors are CRT or flat-panel.
Printer
Represents data as “hard copy.” Some common printers are laser or inkjet.
Speakers

18. Storage Devices
Needed for permanently storing important information such as computer programs, files, and data.

19. Storage Devices Magnetic Storage
Needed for permanently storing important information such as computer programs, files, and data.
Magnetic Storage
Hard Disk
Floppy Disk
Videotape
Plastic or metal platters that are coated with oxide and store data magnetically.

20. Storage Devices Magnetic Storage Optical Storage
Needed for permanently storing important information such as computer programs, files, and data.
Magnetic Storage
Hard Disk
Floppy Disk
Videotape
Plastic or metal platters that are coated with oxide and store data magnetically.
Optical Storage
CDs
DVDs
A storage medium on which data is recorded and read by two lasers

21. Storage Devices Magnetic Storage
Needed for permanently storing important information such as computer programs, files, and data.
Plastic or metal platters that are coated with oxide and store data magnetically.
Magnetic Storage
Hard Disk
Floppy Disk
Videotape
Optical Storage
CDs
DVDs
A storage medium on which data is recorded and read by two lasers
A storage medium on which data is recorded and read by two lasers
A small storage device that can be plugged into a USB port.
USB Storage

22. Computers use a binary or Base 2 system of 0s and 1s (0=Off, 1=On)
Bit
a 0 or a 1
Smallest piece of data a computer understands or stores
Byte
8 0s and 1s
A =
Kilobyte
1,024 bytes
Megabyte
1 million bytes
Gigabyte
1 billion bytes
Terabyte
1 trillion bytes
Petabyte, Exabyte, Zettabyte, Yottabyte

23. IBM leased this machine for $35,000 a year.
In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive (HDD). The HDD weighed over a ton and stored 5MB of data.
IBM leased this machine for $35,000 a year.

25. WAN – Wide Area Network Computers are in a larger geographical area.
Computers that are connected in order to share information and resources. The main computer on a network is called a file server.
LAN – Local Area Network Computers are in close proximity to each other.
WAN – Wide Area Network Computers are in a larger geographical area.

26. A set of instructions or programs that tell a computer what to do.
Software
A set of instructions or programs that tell a computer what to do.

27. Software
Operating System or
Platform
Applications or
Programs

28. This type of software manages RAM, controls peripheral devices, manages file operations (saving, opening, deleting, renaming, etc.), monitors system performance, and provides a user interface
Operating System

29. Operating System DOS, Windows, Vista
This type of software manages RAM, controls peripheral devices, manages file operations (saving, opening, deleting, renaming, etc.), monitors system performance, and provides a user interface
Operating System
Windows is a GUI OS environment that works with DOS. It uses icons and menus to make computers easy to use. You can multitask with Windows.
DOS, Windows, Vista
DOS is a command-line interface OS. It is not very user-friendly!

30. Operating System DOS, Windows, Vista Macintosh
This type of software manages RAM, controls peripheral devices, manages file operations (saving, opening, deleting, renaming, etc.), monitors system performance, and provides a user interface
Operating System
Windows is a GUI OS environment that works with DOS. It uses icons and menus to make computers easy to use. You can multitask with Windows.
DOS, Windows, Vista
DOS is a command-line interface OS. It is not very user-friendly!
Macintosh
Macintosh computers have their own operating system.

31. Other Operating Systems:
This type of software manages RAM, controls peripheral devices, manages file operations (saving, opening, deleting, renaming, etc.), monitors system performance, and provides a user interface
Operating System
Windows is a GUI OS environment that works with DOS. It uses icons and menus to make computers easy to use. You can multitask with Windows.
DOS, Windows, Vista
DOS is a command-line interface OS. It is not very user-friendly!
Macintosh
Macintosh computers have their own operating system.
Other Operating Systems:
Linux, UNIX, OS/2

32. Application Software or Programs
Programs that allow users to perform specific tasks.

33. Application Software or Programs
Programs that allow users to perform specific tasks.
Word Processing
Letters, reports, text

34. Application Software or Programs
Programs that allow users to perform specific tasks.
Word Processing
Letters, reports, text
Spreadsheets
Numbers

35. Electronic Presentations
Application Software or
Programs
Programs that allow users to perform specific tasks.
Word Processing
Letters, reports, text
Spreadsheets
Numbers
Slide Shows
Electronic Presentations

36. Electronic Presentations
Application Software or
Programs
Programs that allow users to perform specific tasks.
Word Processing
Letters, reports, text
Spreadsheets
Numbers
Slide Shows
Electronic Presentations
Browser
World Wide Web

37. Electronic Presentations
Application Software or
Programs
Programs that allow users to perform specific tasks.
Word Processing
Letters, reports, text
Spreadsheets
Numbers
Slide Shows
Electronic Presentations
Browser
World Wide Web
Database
Large collections of data

38. Electronic Presentations
Application Software or
Programs
Programs that allow users to perform specific tasks.
Word Processing
Letters, reports, text
Spreadsheets
Numbers
Slide Shows
Electronic Presentations
Browser
World Wide Web
Database
Large collections of data
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39. Virus
A small computer program or piece of code that is put on a computer (usually without the user knowing about it) that is destructive to the computer.