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Computer fundamentals (How computers have changed our world. (We can now…
Computer fundamentals
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.
Secondary Storage
Magnetic
It is cheap.
Used for recording and tapes. It is quite cheap.
Solid state.
Example can be a USB
It is portable. Can be carried around anywhere.
Optical
Uses optical technology to save and retreive data on disks.
It uses a laser light to read information.
Input devices & Output devices.
Input devices.
Peripheral used to provide data. Examples, Keyboard, Joystick, mouse, scanners and digital cameras.
Output devices
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.
Main memory
RAM
It is volatile
It can be accessed at any time. It stores programs which are currently being run.
ROM
It is non volatile.
Used to boot up the system.
CPU
Central Processing Unit is the brain of the computer.
Reliability
Reliability can be improved by less hackers and more utility softwares.