What are the concept of personal computer and network?

A personal computer is stand alone and covers the ones in private homes. Networking means one or more computers are linked in the same building called a LAN Local Area Network. Networking computers that are not in the same building is done over radio waves and is called WAN Wide Area Network. In your home you can network two or more computers by linking them so you can all use the internet at the same time without having to pay extra internet fees.