Parts of a computer:-

1.   CPU(Central Processing Unit)  2.   Mother Board3.   RAM(Random Access Memory)4.   HDD(Hard Disk Drive)5.   Monitor6.   SMPS(Switched Mode Power Supply)7.   CD-Rom/DVD-Rom/Blue Ray8.   Floppy Drive 9.   Case10.  Case Fan  

If you use a desktop computer, you might already know that there isn't any single part called the "computer." A computer is really a system of many parts working together. The physical parts, which you can see and touch, are collectively called hardware. The illustration below shows the most common hardware in a desktop computer system.