NO. OF TITLE FORM NO. DATE PAGES Machine Methods of Accounting—Foreword AM 1936 6 Development of IBM Corporation AM-1-1 1936 14 Principles of the Electric Accounting Machine Method AM-2 1936 12 The Tabulating Card AM-3-1 1936 20 Design of Tabulating Cards AM-4-1 1936 16 Preparation and Use of Codes AM-5 1936 28 Organization and Supervision of the Tabulating Department AM-6 1936 16 Selection and Training of Key Punch Operators AM-7 1936 12 Accounting Control AM-8 1936 8 Punches AM-9 1936 12 Alphabetic Printing Punches AM-10 1936 7 Facts to Know about Key Punches AM-11 1936 4 Verifiers AM-12 1936 4 Gang Punches AM-13 1936 8 Card-Operated Sorting Machines AM-14 1936 12 Facts to Know about Sorters AM-14a 1936 4 Electric Tabulating Machines AM-15 1936 20 Electric Accounting Machines (Type 285 and Type 297) AM-16 1936 16 Alphabetic Direct Subtraction Accounting Machine AM-17 1936 28 Numerical Interpreters AM-18 1936 8 Electric Punched-Card Interpreter (Type 552) AM-18a 1941 8 Reproducing Punches (Type 512) AM-19 1936 16 Automatic Summary Punches for Use with the Numerical Accounting Machines (Type 285-297) AM-20 1936 16 Automatic Summary Punches for Use with the Alphabetic Accounting Machines (Type 405) AM-20a 1940 16 Multiplying Punches AM-21 1936 16 Application of Machines to Accounting Functions AM-22 1936 24 Other International Products AM-23-2 1936 19 The International Automatic Carriage (Type 921) AM-24 1938 15 The Department of Education of IBM has begun a second series of booklets on the principles of operation of punch-card calculating machinery: INTERNATIONAL BUSINESS MACHINES CORPORATION, DEPARTMENT OF EDUCATION, _Principles of Operation_, Endicott, N. Y.: International Business Machines Corporation, 1942 and later (except for one published in 1939).