Contact (mathematics), a mathematical concept, the idea of curves (for example) touching
Optical contacting, a process in which two highly polished surfaces are permanently or temporarily joined without use of any adhesive
Radar contact, the display of a single radar return from an object as a result of one radar sweep. (Compare with track).
Contact paper, in photography, used to print negatives without enlargement
The Contact Conference, an annual interdisciplinary scientific conference
In professional terminology
Contact (law), in Family Law, deals with the right of parents or other significant persons to meet with and relate to a child
In military parlance, a contact is an encounter with the enemy that results in an engagement. Especially common in Britain and British trained/derived former Commonwealth armed forces.
In healthcare
Contact lens, a corrective, cosmetic, or therapeutic lens
Contact massage, massage that is done by hands or special electronic aids
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