ASF can stand for: In computing: Advanced Systems Format (formerly "Advanced Streaming Format", .asf), a Microsoft streaming format associated with Windows Media Player. as file-extension for APL data files: the standard way for APL programs to store data on disk: filename.asf Algebraic Specification Formalism and the corresponding file extension. Used in the ASF+SDF Meta Environment. Alert Standard Format, a protocol for remote management and control of systems in OS-absent environments (E… (More on Asf)