New York and London: John Wiley & Sons, Inc. 1931-1935. 2 volumes. Vol I: xii, 425 pages. 1931, apparent first edition with no subsequent printings noted and copyright and title page dates matching. Vol II: vii, 587 pages. A later printing (1935 lacking on the title page and a "2/42" printed to the right of the "Printed in U.S.A." on the copyright page). Both volumes are 8vo, publisher's original red cloth (sunned) with gilt titles, and each with a "From the Library of Jay W. Forrester" pasted on the front flyleaf. Vol II also has Forrester's initials on the fore-edges. Dusty. Very Good. Cloth. 
Once fairly common in the marketplace, this set is becoming harder to find in decent condition.
“Jay Wright Forrester (July 14, 1918 – November 16, 2016) was a pioneering American computer engineer and systems scientist. He is credited with being one of the inventors of magnetic core memory, the predominant form of random-access computer memory during the most explosive years of digital computer development (between 1955 and 1975). It was part of a family of related technologies which bridged the gap between vacuum tubes and semiconductors by exploiting the magnetic properties of materials to perform switching and amplification. He is also believed to have created the first animation in the history of computer graphics, a "jumping ball" on an oscilloscope.“ (wikipedia)