Hendrik Demol has been an enthousiast Progress / Openedge programmer since Progress version 4 ... ages ago.
By coincidence, he discovered the power of the Progress 4GL (now called OpenEdge ABL) and instantly fell in love with the language. The V4 documention consisted of just a few books. The last paper based version took up an entire bookshelf.
The Progress family of products (www.progress.com) is now a complete suite of tools to build complete data systems.