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Theory of Switching Circuits, Final Report 1 September 1957, volume I, Unit-Distance Binary Codes, Moore School of Electrical Engineering. Howard E. Tompkins, George W. Patterson.

Theory of Switching Circuits, Final Report 1 September 1957, volume I, Unit-Distance Binary Codes, Moore School of Electrical Engineering.

Moore School of Electrical Engineering, University of Pennsylvania, Philadelphia 1957; 214 pages, xxvi, diagrams, bibliography.
Condition: Very Good overall. Original printed offwhite textured stiff-paper wrappers, black cloth spine. 8.5 x 11, Contract number DA-36-039 SC-72344. Mimeographed typescript. Issued in connection with a joint Moore School-Department of the Army-Signal Corps project, this Volume I 'is the doctoral dissertation of H E Tompkins, one of the investigators on the project.' Errata sheet laid in.
Cover scuffs & smudges, with discoloration along outer margins of cover. Spine cloth torn at top and bottom, rear upper corner of cover and last ten pages slight bend & roll. Small puncture marks on upper front cover as from old staples removed, thin band of staining along top cover and lightly across top of first (a) page. Binding is tight; pages are clean and unmarked, although toned with age.
Price: $45.00
Item no. C8820
Item Description
'It is planned that the final report on this project will be issued in several parts, each a complete volume on one phase of the Theory of Switching Circuits. These separate volumes will be issued as they are finished, to avoid unnecessary delay in making the results of the research available. This first volume, on Unit-Distance Binary Codes, is the doctoral dissertation of H.E. Tompkins, one of the investigators on the project. Some of the content on this volume has already appeared in the Quarterly Progress Reports of the project, in preliminary form. In some cases, substantial revision of that material has been made. In all cases this report is meant to be self-contained, and not require a familiarity with the Quarterly Progress Reports...' (Introduction undersigned by Patterson, DE Mode section head; and JG Brainerd, Director)

Purpose of the project was 'the advancement of switching theory... more particulary the theory concerning the analysis, synthesis, and optimization of computing and control systems and other automata. This theory is related to, but distinct from, the semi-statistical theory of congestion and flow in communication networks such as telephone exchanges...'

'Unit-distance binary codes are digital number-representation systems using binary symbols such as 1 and 0, in which the representations of any two successive natural numbers differ in only one binary place. [They] have application wherever a definite sequence of events is to be specified, for examples, in sequential switching-network design. The most common application, however, has been in analog-to-digital conversion... ' (from the Abstract).