NDR
# NDR

NDR may refer to:

## Computing

* Non delivery report, a return email message to a sender indicating failed message delivery
* Network Data Representation, an implementation of the OSI model presentation layer
* Network Detection and Response, (Security) detects abnormal system behaviors on the network traffic data.

## Science and technology

* Negative differential resistance
* Naming and Design Rules in metadata
* Neighborhood deformation retract, a kind of topological subspace
* National Data Repository, a system to store data about a nation's natural resources

## Others

* Nador International Airport (IATA code name: NDR), airport in Morocco
* National Driver Register, United States
* Norddeutscher Rundfunk, a public radio and television broadcaster in northern Germany
* Norwich Northern Distributor Road or Broadland Northway, a major route around the north of Norwich, England
* Singapore National Day Rally, an annual address that the Prime Minister of Singapore makes to the nation
* Non-invasive disc rehabilitation, NDR Method
* Nash Dom Rossiya (Наш Дом Россия, Our Home – Russia), Russian political party
* North Diversion Road, which is a nickname to North Luzon Expressway and formerly its official name
