DAFS may refer to: Damage Analysis and Fundamental Studies, a program of the United States Department of Energy that studies radiation damage Direct Access File System, a network file system that uses remote direct memory access to perform efficient network access to data in remote files Direct Aerial Fire Support, a term describing helicopter combat support Diffraction Anomalous Fine Structure, an X-ray technique for determining atomic structure Document Attribute Format Specification, an interchange format representing document structure

See also DAF (disambiguation)