How computers have changed our world.
We can now transfer data from ne place to another by using a USB.
We can nw access the internet.
We can communicate with others via social media.
We can store files and data online.
They help us with everyday problems.
Example can be a USB
It is portable. Can be carried around anywhere.
It is cheap.
Used for recording and tapes. It is quite cheap.
Uses optical technology to save and retreive data on disks.
It uses a laser light to read information.
Input devices & Output devices.
Peripheral used to provide data. Examples, Keyboard, Joystick, mouse, scanners and digital cameras.
A peripheral which receives data from the computer system. Example can be a printer or a monitor.
Commonalities between computer systems.
They all contain RAM, ROM and CPU.
Computers, phones and tablets all have input and output devices.
They all contain secondary storage.
Importance of computers
It can accomplish many tasks at once.
It has become part of our everyday lives.
Without computers it will be difficult for us to do our work.
It is volatile
It can be accessed at any time. It stores programs which are currently being run.
It is non volatile.
Used to boot up the system.
Central Processing Unit is the brain of the computer.
Reliability can be improved by less hackers and more utility softwares.