DFS can refer to several things.

Computing, Engineering and Mathematics[link]

File systems[link]

• DCE Distributed File System (DCE/DFS)
• Disc Filing System, a filesystem developed by Acorn Computers
• Distributed file system, a method of storing persistent data over computer network
• Distributed File System (Microsoft)

Quantum Computing[link]

• Decoherence-free subspaces, subspace of a system's Hilbert space where the system is decoupled from the environment

Engineering[link]

• Definitive Feasibility Study, a stage of engineering project development
• Design for service, a type of 'Design for X', an engineering methodology
• DFS-Kopernikus: a series of satellites
• Digital Frequency Synthesizer, generation of different frequency from another in phase
• Discrete Fourier Series, the discrete version of Fourier series
• Dynamic frequency scaling, a method for reducing a microprocessor's power consumption
• Dynamic Frequency Selection: part of the IEEE 802.11h wireless standard

Algorithm[link]

• Depth-first search algorithm, a part of graph theory

Organizations and Companies[link]

Education[link]

• Department of financial studies, University of Delhi, Delhi, India.

Germany[link]

• Deutsche Flugsicherung, The German air traffic control organisation
• Deutsche Forschungsanstalt für Segelflug (German Research Institute for Sailplane Flight), developers of the "DFS brake" for gliders.

Other countries[link]

• Dancer Fitzgerald Sample, a defunct advertising agency, now known as Saatchi & Saatchi.
• Dell Financial Services
• Department of Family Services
• DFS Galleria: A Hong Kong-based retailer (part of LVMH) operating duty-free shops
• DFS (United Kingdom retailer): a British furniture retailer.
• Dirección Federal de Seguridad, Federal Direction of Security in Mexico
• Discover Financial Services, which offers the Discover Card
• DSM Food Specialties

Other[link]

• Department of Field Support (UN Peacekeeping)
• DFS, a 90s Hip House group who gained popularity with the track "ou ee ou"
• Disease-free survival, in medicine, a measure of the efficacy of treatment of e.g. cancer
• Duty-free shop
• Dynamic-force spectroscopy
• Death for Sure
• Dragonfire Shield: a powerful shield in the MMORPG Runescape

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