BUTTON(S), 1. items, words, phrases, subjects or areas that cause response or reaction in an individual by the words or actions of other people, and which cause him discomfort, embarrassment, or upset, or make him laugh uncontrollably. (Scn AD) 2. things in particular that each human being finds aberrative and has in common. (HFP, p. 127) 3. restimulators, words, voice tones, music, whatever they are–things which are filed in the reactive mind bank as parts of engrams. (DMSMH, p. 74) 4. (suppress button, invalidate button, etc.), it is called a button because when you push it (say it) you can get a meter reaction. (HCOB 29 Jan 70)
Hubbard, L. R., (1975) Dianetics and Scientology Technical Dictionary. Los Angeles: Church of Scientology of California Publications Organization.