Compression may refer to:

• Gas compression, raising the pressure and reducing the volume of gases
• Physical compression, the result of the subjection of a material to compressive stress
• Compression arch suspended-deck bridge, a compression arch rises above the deck
• Compression (geology), a system of forces that tend to decrease the volume of or shorten rocks. A gas compressor is a mechanical device that increases the Pressure of a Gas by reducing its Volume. Physical compression is the result of the subjection of a material to Compressive stress, resulting in reduction of Volume. A compression arch suspended-deck bridge, or through arch bridge, is a Bridge made from modern materials such as steel or reinforced concrete in which a In Geology the term compression refers to the system of forces that tend to decrease the volume of or shorten rocks
• Compression in zoology and paleontology refers to where an animal, or part of an animal is shorter or narrower compared with other animals in the same group; eg the body of a lizard may be compressed (flattened) so it can better fit into crevices under rocks. Zoology (from Greek ζῷον, zoon, "animal" + λόγος, " Logos " "knowledge" is the branch of Palaeontology redirects here For the Scientific journal, see Palaeontology (journal.
• Compression ratio, a number that predicts the performance of any internal-combustion engine
• Data compression, encoding information using fewer bits
  • Image compression
  • Audio data compression
  • Video compression
    • Compression artifact, noticeable defects in audio or video that has been compressed
  • Bandwidth compression, in telecommunications
• Gain compression in electronic amplifiers, which is a result of device non-linearity
• Audio level compression, usually artificially introduced gain compression to improve the perceived quality of audio
• Compression (functional analysis), in mathematics
• Compression bandage, designed to reduce the flow of blood
• Compression, the opposite of Tension. The compression ratio is a single number that can be used to predict the performance of any engine particularly piston engines (but can be used on essentially any Internal-combustion Image compression is the application of Data compression on Digital images In effect the objective is to reduce redundancy of the image data in order to be able to For processes which reduce the amount of time it takes to listen to and understand a recording see Time-compressed speech. Video compression refers to reducing the quantity of Data used to represent video images and is a straightforward combination of Image compression and Motion A compression artifact (or artefact) is the result of an aggressive Data compression scheme applied to an Image, audio, or Video In Telecommunication, the term bandwidth compression has the following meanings The reduction of the bandwidth needed to transmit a given amount of Gain compression in an Electronic amplifier circuit is a reduction in 'differential' or 'slope' gain caused by Nonlinearity of the Transfer function Dynamic range compression, also called DRC (often seen in DVD player settings or simply compression, is a process that reduces the Dynamic range of In Functional analysis, the compression of a Linear operator T on a Hilbert space to a Subspace K is the operator A bandage is a piece of material used either to support a medical device such as a dressing or splint, or on its own to provide support to the body

Compressibility also has the special meanings:

• Compressibility, a measure of volume change resulting from pressure (typically for fluids)
• Reciprocal of the bulk modulus (typically for solids)

See also

• Gas compressor
• Compressor
• Kompressor
• Compressor (software), Final Cut video and audio compression and encoding application
• compress, a UNIX program
• Compaction
• Decompression
• Expansion
• Compression shorts

In Thermodynamics and Fluid mechanics, compressibility is a measure of the relative volume change of a Fluid or Solid as a response A gas compressor is a mechanical device that increases the Pressure of a Gas by reducing its Volume. Compressor is a video and audio media compression and encoding application for use with Final Cut Studio and Logic Studio on Mac OS X. compress is a UNIX compression program based on the LZC compression method which is an LZW implementation using variable size pointers as in Compression shorts are an undergarment usually worn by athletes

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