Herman H. Goldstine & John von Neumann 
Planning and Coding of Problems for an Electronic Computing Instrument [PDF ebook] 
Report on the Mathematical and Logical Aspects of an Electronic Computing Instrument

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The use of the input – output medium as a subsidiary memory is not discussed. This Will probably be taken up in Part III.