Answer:
Fingerprints are studied as a subject:Dactylology It is used by astrologers for predictions.
It is used as biometric study in identification of individuals on documents.
If one is employed in a field that requires a background check, it is used to establish ones identity.
If one is arrested, it is used to establish identity.
At a place of a crime scene a person's fingerprint is sent for analysis. Many computerised locks operate from ones fingerprint.