Test, TEST or Tester may refer to: Test (assessment), an assessment intended to measure the respondents' knowledge or other abilities == Science and technology == test (Unix), a Unix command for evaluating conditional expressions TEST (x86 instruction), an x86 assembly language instruction Experiment, a part of the scientific method Test (biology), the shell of sea urchins and certain microorganisms Test method, a definitive procedure that produces a test result Physical test Chemical test Statistical test == People == Desmond Tester (1919–2002), Anglo-Australian actor John Test (1771–1...