In general, conversion is the transformation of one thing into another. Articles on particular kinds of conversion...

DirectShow (sometimes abbreviated as DS or DShow), codename Quartz, is a multimedia framework and API produced by Microsoft for software developers to perform various operations with media files. It is a replacement for Microsoft's earlier Video for...

filter (photography)

filter (mathematics).

Internet filter

filter (air)

Filtration is a mechanical/physical operation which is used for the separation of solids from fluids (liquids or gases) by interposing a medium to fluid flow through which the fluid can pass, but the solids (or at least part of the solids) in the fluid...

Filter (band), an industrial rock band

electronic filter

filter (oil)

filter (optics)

wordfilter

cigarette filter.

See filtering problem (stochastic processes) for the mathematical formalism.

Filter (magazine), an off-beat indie music magazine

mail filter

In transportation, filtering, a.k.a. lane splitting

Filter coffee, a method for preparing coffee

filter (Unix)

Filter feeder, an animal that strains food particles from water

Philter, a magical potion

filter (higher-order function)

Filter (television), a show on the G4 channel:

filter (water)

pneumatic filter

BPF filter expression used in the qualification of network data

filter (software)

line 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

audio filter

filter (chemistry)

infrared filter

affective filter.

In mathematics, a certain kind of subset of a partially ordered set. See

Helicon Filter, a raster graphics editor