In audio technology, acoustic fingerprint is an unique code generated from audio samples, allowing computer identification of music.
In typewriters, a fingerprint is a combination of tolerances and wear of the types, allowing identifying the machine the document was typed on.
In paper shredders, a fingerprint consists of minute variations of the spacing of its blades.
In radio transceivers, a fingerprint is a set of minute variations of frequencies and modulation parameters, characteristic for the combination of tolerances of parts in a given device.
Generally, a fingerprint is a combination of variables characteristical for one individual member or an individual class of a group. These are in some cases also called signatures.
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Fingerprint identification (sometimes referred to as dactyloscopy) is the process of comparing questioned and known friction skin ridge impressions (see Minutiae) from fingers, palms, and toes to determine if the impressions are from the same finger (or palm, toe, etc.).
Fingerprints collected at a crime scene, or on items of evidence from a crime, can be used in forensic science to identify suspects, victims and other persons who touched a surface.
Fingerprint identification emerged as an important system within police agencies in the late 19th century, when it replaced anthropometric measurements as a more reliable method for identifying persons having a prior record, often under an alias name, in a criminal record repository.
Fingerprints (or more commonly, footprints) are sometimes used to identify infants, though this practice is not as common as it used to be, especially with DNA identification becoming more commonplace.
Fingerprints are an early example of biometrics, the science of identifying individuals by their physical characteristics.
Fingerprint examiners have certainly disagreed with one another: the case of Shirley McKie was a notable case involving fingerprints.
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