Lecture 3
Download
1 / 18

Lecture 3 - PowerPoint PPT Presentation


  • 109 Views
  • Uploaded on

Lecture 3. Storage units , output , output units. Storage units. used to store data at the request of the user , the units do not lose their contents when you turn off the device or power Outages. Main.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Lecture 3' - nayef


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Lecture 3

Lecture 3

Storage units , output ,output units


Storage units
Storage units

  • used to store data at the request of the user, the units do not lose their contents when you turn off the device or power Outages


  • Consists of several hard disk drives and this explains its ability to absorb a large amount of data.

  • storage capacity of up to more than 400 GBYTE

  • HDD


  • Floppy disk consists of only one disk and this explains to absorb a small amount of data.

  • the maximum storage capacity is 1.44Mbyte.

  • FDD


  • CD consists of material reflecting the light، the data is stored by using lasers.

  • used for read-only and cannot add data to it only through a special device to write the so-called CDWriter.

  • storage capacity of up to 750MBYTE.

  • CDROM drive


  • Similar to the floppy disk in terms of shape and has a drive motor is similar to the floppy disk.

  • it is characterized by a capacity of storage medium.

  • ZIP Drive


  • small-sized storage units .

  • connected through the ports of USB .

  • capacity of up to more than 32MByte.

  • Flash memory


  • External drive the largest in terms of storage capacity, cost and size.

  • External HDD


Input units
Input units

Input unit

Enter and deliver the data to be processed to the CPU .

Ex:

  • Keyboard.

  • Mouse.

  • Scanner.

  • Bar code reader.

  • Joy stick


Output units
output units

Output units

Directed by which the data have been processed when the user requested

Ex:

  • Monitor .

  • Printer.

  • Speaker.


Input output at the same time
input, output at the same time

Touch screen

Is a unit display data (text, images) and at the same time to receive orders and options by clicking on it by the finger or a special pen


Units of measurement capacities in the computer
Units of measurement capacities in the computer

  • Represent the data within the computer using binary digital data(0,1).

  • BIT is one of the two cases (0,1)


Units derived from bit
Units derived from BIT

  • Byte=8Bit

  • Kbyte=1024Byte

  • MByte=1024Kbyte

  • GByte= 1024MByte


Units used to measure the capacity of storage media
Units used to measure the capacity of storage media

  • Capacity is measured in bytes of storage media and Derivative


Units of measure processor speed
Units of measure processor speed

  • Processor speed is measured through the unity of electrical frequency (Hz) and derivatives

  • 1MHZ= 1000HZ

  • 1GHZ=1000X1000HZ=1000MHZ


The units measure the speed of the motherboard
The units measure the speed of the motherboard

  • Measured the speed of the motherboard through the unit Hz.

  • the speed of the so-called BUS


Note

When increasing the speed of the motherboard and processor and memory capacity of RAM and hard drive capacity increases the efficiency of the computer


ad