FDD may refer to:

Politics

* CNDD-FDD, a political party in Burundi *

Forum for Democracy and Development The Forum for Democracy and Development (FDD) is a political party in Zambia. History The FDD was founded in 2001 by former members of the Movement for Multi-Party Democracy (MMD), disaffected by Frederick Chiluba's efforts to change the constit ...

, a political party in Zambia * KAZE-FDD, a political party in Burundi

Science and technology

* Floppy disk drive *

Frequency-division duplex A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions. Duplex systems are employed in many communications networks, either to allow ...

, a telecommunications duplex indexing method *

Frequency domain decomposition The frequency domain decomposition (FDD) is an output-only system identification technique popular in civil engineering, in particular in structural health monitoring. As an output-only algorithm, it is useful when the input data is unknown. FDD ...

, a system identification technique *

LTE-FDD In telecommunications, long-term evolution (LTE) is a standard for wireless broadband communication for mobile devices and data terminals, based on the GSM/EDGE and UMTS/HSPA standards. It improves on those standards' capacity and speed by usi ...

, a 4G telecommunications technology and standard *

Timex FDD The Timex FDD 3000 in 1982 was a nearly complete computer by Timex of Portugal. It began its development at Timex Computer Corporation in the U.S., but it was at Timex of Portugal that the work was finished. The Timex FDD 3000 is an upgraded ...

, a nearly complete computer by Timex *

UMTS-FDD The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the Inte ...

, an air interface standard in 3G mobile telecommunications networks *Fault detection and diagnostics, by

Automated Logic Corporation Automated Logic Corporation is located in Kennesaw, Georgia, United States and manufactures building automation systems. Several of its technological innovations include: the WebCTRL® building automation system; Environmental Index™ tool; Th ...

Other uses

* Feature-driven development, a project management approach * Forces for the Defense of Democracy, a rebel group in Burundi *

Foundation for Defense of Democracies The Foundation for Defense of Democracies (FDD) is a 501(c)(3) non-profit think tank and registered lobbying organization based in Washington, D.C., United States. The group's political leanings have been described as hawkish and neoconservative ...

, a policy institute based in Washington, D.C., US * Franchise disclosure document (2008), UFDD/UFOC Uniform Franchise Offering Circular * The Danish Scout Council, formerly the ''Fællesrådet for Danmarks Drengespejdere'' *"F.D.D.", the opening theme to the anime

Chaos;Head ''Chaos;Head'' (stylized as ''ChäoS;HEAd'') is a 2008 science fiction visual novel video game developed by 5pb. and Nitroplus. It is the first game in the ''Science Adventure'' series. Following the original Windows release, the enhanced ver ...

sung by Kanako Itō {{disambiguation