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"talisman, charm," 1881, from provincial French mascotte "sorcerer's charm, 'faerie friend,' good luck piece" (19c.), of uncertain origin, perhaps from or related to Provençal mascoto "sorcery, fetish" (cf. Narbonnese manuscript, 1233, mascotto "procuress, enchantment, bewitchment in gambling"), from masco "witch," from Old Provençal masca, itself of unknown origin, perhaps from Medieval Latin masca "mask, specter, nightmare" (see mask (n.)). Popularized by French composer Edmond Audran's 1880 comic operetta "La Mascotte," about a household "fairy" who gives luck to an Italian peasant, performed in a toned-down translation in England from fall 1881.
Modular Approach to Software Construction Operation and Test: a method for software design aimed at real-time embedded systems from the Royal Signals and Research Establishment, UK.