GNU/Linux Desktop Survival Guide
by Graham Williams
dia was written by Alexander Larsson. It is being actively developed by further by James Henstridge and Lars R. Clausen with significant contributions from Fredrik Hallenberg, Emmanuel Briot, Francis J. Lacoste, Alejandro Aguilar Sierra, Jerome Abela, Cyrille Chepelov, Henk Jan Priester, Jacek Pliszka, Steffen Macke, and Hans Breuer.
Cyrille Chepelov implemented the Ladder, Pneumatic/Hydraulic, Chronograms, and Grafcet sheets and provided the descriptions included in this chapter.
The dia home page (http://www.lysator.liu.se/~alla/dia/) provides background information, a features list, and a pointer to Harry George's on-line tutorial introduction.
Lars R. Clausen has provided valuable commentary on this document.