The term may refer to:
- In chemistry, engineering, or household usage, a device to separate mixtures. See
- --- Filter (chemistry)
- --- Filter (water)
- --- Filter (air)
- --- Pneumatic Filter
- --- Cigarette Filter .
- In optics and photography, a device to remove or block certain wavelengths (colors) of light. See
- --- Filter (optics)
- --- Filter (photography)
- --- Infrared Filter
- In computing, a program to process a data stream. See
- --- Filter (software)
- --- Filter (Unix)
- --- Mail Filter
- --- Internet Filter
- --- Lameness Filter .
- In Signal Processing applications such as telecommunications and music, an electronic or mechanical device, or mathematical algorithm, to modify the harmonic content of signals. See
- --- Electronic Filter
- --- Audio Filter .
- In mathematics, a certain kind of Subset of a Partially Ordered Set . See
- --- Filter (mathematics) .
- In psychology, a type of learning blockage. See
- --- Affective Filter .
may may also be the name of:
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