The three different types of Personal Computers is an Desktop Computer, Tablet, and a Laptop. Desktop Computer is an computer designed to be used on a desktop. Tablet is designed to be used on a desktop but still can be portable. A Laptop is an computer designed to be small enough and light enough to be used on your lap.
Hardware is the physical parts of an computer. Examples of Hardware is mouse, keyboard, monitor, and etc.
Software is a set of instructions that tells the computer what to do. There are two types of Software. There is System Software and Applications Software. Other examples of a Software is Ms Word, MS Excel, and MS Access.