 Many of the pioneers of early computer development, especially those involved with [ENIAC] contributed to the Moore School Lectures, most prolifically Pres Eckert, followed by John Mauchly and Herman Goldstine.The topics covered virtually all facets of electronic computing relevant to the construction and operation of digital computers, and included, by popular demand, an unscheduled presentation of the ENIAC during the latter half of the sixth week and the first half of the seventh week, with lectures by Mauchly, Sharpless, and Chu.Discussions of the ENIAC were resisted since its logical design had been obsoleted even before its completion by ongoing work on the EDVAC with its stored-program concept; nevertheless, it was the only electronic digital computer then in operation and the students petitioned to see demonstrations and learn of its design.