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, detection of abnormal system behaviors on 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 Nonlinear dispersion relation, in plasma physics
Others IATA code for Nador International Airport, airport in Morocco Postal code for Nadur, Gozo, Malta National Driver Register, United States Non-invasive disc rehabilitation, NDR Method 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 North Diversion Road, which is a nickname to North Luzon Expressway and formerly its official name Our Home – Russia (), defunct Russian political party Singapore National Day Rally, an annual address that the Prime Minister of Singapore makes to the nation