POIT Lesson 6 Peripherals

Notes:

-Peripherals are devices used for computer input or output.
Input:

• Keyboard - reports each key and gives commands to the operating system
• Mouse - many different types, main are Laser or Optical.
• Scanner- takes a picture of a document and saves it as a file that you can manipulate

Both:

• Drives - Drives can be both input and output devices. A CD reader is an example of an input device  but if your CD reader can also write, it is an output device. Example: 3 1/2 Floppy drive, CD-ROM drive, DVD drive, and Blu-Ray drive.

Output:

• Printers - Make a hard copy of a document from your computer
• Monitor - LCD (flat screen), CRT (tubes in the back) *monitors can be inputs when they are touchscreen.

- A Pixel is the smallest colored dot that can be displayed on a screen.

-External devices provide more storage.

  Always back things up if they are important to you. Many things could easily go wrong, so back up important information.

- Tower Cases have expansion bays. It makes your computer more powerful because you have the ability to add stuff like hard drives or optical drives in.