Aris, J.B.B., (1997), The LEO approach an evaluation in Caminer, D.T., et al, editors, Leave a Comment / By LEO editor LEO: The Incredible Story of the World’s First Business Computer, McGraw-Hill, New York, Part 4, Chapter 27, pp.321-336.❖ Aris, J.B.B. (1996) ‘Systems Design – Then and Now’, Resurr Share this:FacebookXLike this:Like Loading...