which is the most usefull part of the computer ?

well i think the procesor is the most important part cause without it you computer will be "slow" and you can enjoy the computer so much without speed

I would say the most useful part are the hard disk. It store all the data and when our computer become obsolete, we can still unplug it and install in our new computer. But it's starting to shift to SATA interface. Those IDE could still be use, just that we need to buy a harddisk casing to house it. Then connect to our new PC with USB interface. It will need a external power source though. All in all, it's just functioning like a external hard disk.

Cpu is the most usefull part

i think its screen/monitor

yeaa mouse is the most useful,cause it vl increase the time efficiency and performs high jobs wid in a short period of time.....

i think cpu(central processing unit) is the most usefull and powerfull part of computer because without cpu there is nothing in the computer.