Filter

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The term filter may refer to:

In chemistry, engineering, or household usage, a device to separate mixtures. See
*filter (chemistry)
*filter (water)
*filter (air)
*filter (oil)
*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 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 computing, a program to process a data stream. See
*filter (software)
*filter (Unix)
*mail filter
*Internet filter
*lameness 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.

Filter may also be the name of:

See also