Genealogy of the First General-Purpose Programmable Digital Computers xiiiĬollecting the Printed and Manuscript Records of the Early History of Computing, Networking,Īnd Telecommunications BY JEREMY M. (Photograph used by permission of the University of Pennsylvania’s School of Engineering and Applied Science.) It weighed  tons, contained , vacuum tubes, , resistors, , capacitors,  switches, and  relays, and required  kilowatts to run. From  to  it was the only operating electronic digital computer in the world. First operational in May , the ENIAC was announced to the public in February . Homer Spence, Elizabeth Jennings, Herman H. Also visible in the photograph (left to right) are Pfc. Pres Eckert (center left) and John Mauchly (center right) working with the ENIAC, the first large-scale general-purpose electronic digital computer, from which all later electronic digital computers descend. ORIGINS OF CYBERSPACE A Library on the History of Computing, Networking, and Telecommunicationsīy Diana H. ORIGINS of CYBERSPACE a Library on the History of Computing, Networking, and Telecommunications

Origins of Cyberspace by Diana H. Hook