of this is that a file name that begins with the system name refers to files on other computers and can be opened without the need for any special networking. The same is true for devices. Other system entities, such as processes, are referenced using module names which are written %system#module. The VOS system and module names have no defined relationship with IP addresses or domain names—The VOS API was developed in late 1980—before the Internet was widely adopted and long before URLs were even invented. Historically, StrataLINK was a proprietary 10Mb CSMA/CD ring network which allowed high performance (for the time) with very low memory overhead and CPU utilization. This was never developed beyond 10Mb and was dropped in favor of using TCP/IP because Ethernet became the dominant networking standard and because memory and CPU processing got cheaper. Open StrataLINK can also use X.25 for wide area communications. Using the Open StrataLINK protocols for wide area communications is also referred to as StrataNET. See also Comparison of command shells Tandem Computers References External links Official OpenVOS website Comp.Sys.Stratus Stratus Public FTP Server Stratus Documentation Site Proprietary operating systems Fault-tolerant computer systems Multics-like