DEC software

thumb|300px|right|Modified PDP-7 under restoration in Oslo, Norway thumb|200x200px|PDP-7 at Living Computer Museum

AdvFS, also known as Tru64 UNIX Advanced File System, is a file system developed in the late 1980s to mid-1990s by Digital Equipment Corporation for their OSF/1 version of the Unix operating system (later Digital UNIX/Tru64 UNIX). In June 2008, it was released as free software under the GPL-2.0-only license. AdvFS has been used in high-availability systems where fast recovery from downtime is essential.

command language adopted by several operating systems (OSs)

level programming language for the Lego Mindstorms NXT