Erhard Seminars Training, Inc. (marketed as est, though often encountered as EST or Est) was an organization founded by Werner Erhard in 1971 that offered a two-weekend (6-day, 60-hour) course known officially as "The est Standard Training".
Erhard Seminars Training, Inc. (marketed as est, though often encountered as EST or Est) was an organization founded by Werner Erhard in 1971 that offered a two-weekend (6-day, 60-hour) course known officially as "The est Standard Training".
Source: Wikipedia "Erhard Seminars Training" · CC BY-SA 4.0
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