Artifact Details Title Timing in Sigma : talk with Ed Voorhees, Erich Bloch, Bob Block, Bill Madden Catalog Number 102635057 Type Document Description Handwritten Stretch math planning, 1959 Date Feb. 27, 1959 Extent 6 p. Category Meeting report Subject IBM Project Stretch; IBM Sigma (Computer) Credit Gift of Harwood G. Kolsky Lot Number X3021.2005 102635057.pdf