The centralization of local and Internet communications through a server: User account management is on a single machine, so there is no need to create user accounts, passwords and permissions on each workstation. File and database storage enable access at any time to any workstation according to the desired permissions, so there is no need to carry files on disk or memory stick anymore or create sharing networks on several workstations. The use of virtual machines (eg VMware) is possible, that is several working environments that can operate simultaneously and / or using multiple operating systems (Windows or Linux). Data backup are further simplified and can be automated since most data are all on the same machine. The use of web (HTTP and FTP) and email services is possible. Terminal services and VPN allow access from outside authorized computers to the enteprise network through a secure Internet connection. Internet traffic filtering protects the enterprise network against unauthorized access. Many other possibilities...