The original host-based UNIX naming system was developed for stand-alone UNIX machines and then adapted for network use. Many old UNIX operating systems and machines still manage all naming data by using only local files in /etc. However, managing hosts, users, and other naming data by using local files is not well suited for large complex networks. For a description of each file, refer to their associated man pages. For example, the /etc/inet/hosts file is described in the hosts (4) man page.