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Lot 167

MARK I MANUAL.
[HOPPER, GRACE.] STAFF OF THE COMPUTATION LABORATORY.
A Manual of Operation for the Automatic Sequence Controlled Calculator. Harvard University Press: 1946.

4 June 2014, 13:00 EDT
New York

Sold for US$875 inc. premium

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MARK I MANUAL.

[HOPPER, GRACE.] STAFF OF THE COMPUTATION LABORATORY. A Manual of Operation for the Automatic Sequence Controlled Calculator. Harvard University Press: 1946.
4to. 17 full-page photographic illustrations. Original blue cloth. Corners just bumped.

THE FIRST COMPUTER MANUAL AND THE "FIRST EXTENDED ANALYSIS OF WHAT IS NOW KNOWN AS COMPUTER PROGRAMMING" (OOC p 299). Authored primarily by Howard Aiken and Grace Hopper. The electromechanical Harvard Mark I ("Automatic Sequence Controlled Calculator") became operational in 1944 and was "the first programmable calculating machine to actually produce mathematical tables, fulfilling the dream of Charles Babbage originally set out in print in 1822" (OOC). "Aiken's Mark I opened the eyes of many to the possibilities of large-scale, programmed automatic computing. Actual witnesses to the developments of the mid 1940's ... agree that its dedication inaugurated the computer age" (Cohen Howard Aiken p 303).
The Mark I's then-unique Manual was no less significant. In the words of computer historian Paul Ceruzzi, the Manual was "a milepost that marked the state of the art of machine computation at one of its critical places: where, for the first time, machines could automatically evaluate arbitrary sequences of arithmetic operations. Most of this volume ... consists of descriptions of the Mark I's components, its architecture, and operational codes for directing it to solve typical problems ... The Manual is one of the first places where sequences of arithmetic operations for the solution of numeric problems by machine were explicitly spelled out. It is furthermore the first extended analysis of what is now known as computer programming since Charles Babbage's and Lady Lovelace's writings a century earlier. The instruction sequences, which one finds scattered throughout this volume, are thus among the earliest examples anywhere of digital computer programs" (Introduction to the Babbage Institute reprint edition, 1985). Origins of Cyberspace 411.

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