API is the Applicaton Programming Interface for Data Design version 3.

This package includes engine v3.11, 3.14 and 3.16 and some text and PDF files.

Thanks to Markus Dettweiler for recovering these files to add to the range of the formerly commercial PROGS software now available free.

Download the API from http://www.dilwyn.me.uk/database/index.html (scroll down to the DataDesign section).