DSF

Computerized listing, updated every two months, of all addresses served by the U.S. Postal Service. The DSF has over 125 million records. The USPS issues a limited number of nonexclusive licenses (currently nine) to private sector service companies that use the file to provide large volume mailers with list services. These services include address validation and standardization that improve address hygiene, carrier walk sequence coding application of nine-digit zip codes and carrier route coding, and identification of seasonal addresses. These services increase the deliverability of the mailer's list by identifying undeliverable addresses and reduce the expense of mailing undeliverable pieces. The DSF can also be used to sort business addresses from residential. DSF does not provide corporate mail stops; the internal mail boxes many larger companies require for mailroom delivery. See also delivery point bar code.

DSF can mean:

• Deutsches Sportfernsehen, a German TV channel for sport
• Democratic Students' Front, an independent political students' organisation of Jadavpur University
• DSF Refractories & Minerals Ltd, a British refractory brick manufacturer
• David Suzuki Foundation, a Canadian environmental charity
• Digital solidarity fund, a Swiss law foundation which aims to reduce the digital divide
• Dubai Shopping Festival, a prime festival/retail season in Dubai
• Dubstep Forum, a website dedicated to the musical genre of Dubstep
• Discrete Summation Formulae, a number of formulas for synthesizing bandlimited periodic signals
• Division of State Facilies of the Wisconsin Department of Administration
• Double-skin facade, a type of building facade
• Delivery Sequence File, a database which contains every mail address serviced by the USPS
• Douglas S. Freeman High School, a high school in Richmond, Virginia
• Django Software Foundation, a non-profit foundation to support Django (a web programming framework) development
• Device Simulation Framework, a part of the Windows Driver Kit

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