A good deal of this was at the MIT Radiation Laboratory (Rad Lab), but other laboratories in the US and the UK were also involved such as the Telecommunications Research Establishment in the UK.
Electronic filter | Digital filter | Cherry Filter | Air filter | Photographic filter | Ohne Filter | Kalman filter | digital filter | Water filter | water filter | Shiva amplifier chains showing spatial filter tubes (white) and Nd:glass amplifier structures (short blue tubes closest to camera). Portions of the 1982 Disney film ''Tron | Sand filter | Probabilistic data association filter | Oil filter | Neutral density filter | Klaus Filter | Fram (oil filter) | elliptic filter | CSS filter | Cast Iron Filter | Band-pass filter | air filter | Adaptive filter |