Se> (AESOP) An early interactive query SyStem on the IBM 1800 uSing a light pen. ["AESOP: A Final Report: A Prototype Interactive Information Control SyStem", J.K. SummerS et al, in Information SyStem Science and Technology, D. Walker ed, 1967]. [Sammet 1969, p. 703]. (1995-04-04)