A computer is a machine that can complete a list of instructions and be programed to do new things.
http://www.techterms.com/definition/computer
hardwear refers to an actual piece of the computer

Definition of Hardware
Softwear is a term that describes the programs used to operate computers.

What is software? - Definition from Whatis.com
A sequence of coded instructions that can be inserted into a computer.
Program - Definition and More from the Free Merriam-Webster Dictionary
infomation put into a computer system.
input - definition of input by the Free Online Dictionary ...
The infomation produced by a program or input.
output - definition of output by the Free Online Dictionary ...
The part of a computer that stores infomation for use.
storage - definition of storage by the Free Online Dictionary ...
A series of actions and changes bringing about a result
Processing - definition of Processing by the Free Online ...

monitor.
a monitor shows infomation.
keyboard.
a keyboard allows you to communicate with the computer.
hard drive.
a hard drive processes infomation.
cooling fan.
a cooling fan stops the hard drive from overheating.
ram.
allows you to find data without searching the whole computer.
cpu
the cpu processes infomation and keeps everything else running.
clock
the clock keeps everything else in time.
modem
a modem allows communication between computers over the phone.video card
a video card generates images.

sound card

a sound card generates sounds.

motherboard

a mother allows all the parts of the computer to connect with each other.

usb stick

a usb stick stores infomation.

cd-rom

a cd-rom stores infomation.

dvd drive

a dvd drive plays dvds.

cd drive

a cd drive plays cds.

floppy disk

a floppy drive stores infomation.

mouse

a mouse allows you to communicate with the computer.

printer

a printer draws documents onto paper.

power supply

a power supply supplies power to the rest of the computer.