What is the difference between laptop and desktop?

laptop is movable device, you can carry your work and can done from any place where has desktop is fixed device after your work only you can move and only you can carry ur document if any edit to be done then you need to come back to the place where your desktop is fixed. 

LAPTOP IS MOBILE WHILE DESKTOP IS FIXED ON A PLACE

A Laptop is a compact mobile device while a desktop is not.

A laptop is a single machine with the hard drive, disk drive, monitor, wireless modem, keyboard and mouse contained within it, and it easily folds to be stored in a carrying case