The Professional Programmers' Calculator
IO
The IO User Manual contains detailed descriptions of all of IO's features and options.
​
It also contains chapters covering the mathematics used throughout the document, detailing the terminology and notations used, as well as detailed descriptions of all the number codings supported by IO.
​
It is supplied as a PDF file containing over 360 pages, including a Contents and a comprehensive Index. Note that some PDF readers will display some of the many diagrams more/less clearly than others.
​
It is freely available for download, You do not need to have purchased IO in order to download the User Manual PDF file.
​
Please note that the currently available download is a pre-release version which is nearly, but not yet, complete.
​
The link below can be used to read the IO User Manual in your browser, or to download the PDF file to your computer. How you perform these operations will depend on which browser you are using.