This document classifies and describes different types of computer networks based on their size and purpose. It discusses Personal Area Networks (PANs), Local Area Networks (LANs), Metropolitan Area Networks (MANs), and Wide Area Networks (WANs). For each network type, it provides details on their geographic range, common uses, advantages, and disadvantages. It concludes by listing some other specialized network types such as WLANs, Storage Area Networks, and Campus Area Networks.