Good day to all. I'm revisiting a very old project and need to update a flow chart=20 that was done a couple of decades ago. There are enough changes that=20 I'm just going to start from scratch, using the original as a guide. I haven't done a flow-chart in a *very* long time. Can anyone=20 suggest a simple, robust, long-lived product that I might=20 consider? I prefer to find something that is long-lived, so that I=20 don't have to relearn a new package from scratch the next time that I=20 want to use it. This particular flow chart is intended to show the internal software=20 operation of a control system for industrial process ovens that use=20 catalytic heaters. This is very old technology for us but there are=20 many hundreds of these control systems still out in use - and we keep=20 making more. The safety people at a new customer's site want to see=20 how we do our safety stuff and it's easier to present the software=20 internals in a flow-chart format than in any other format that I can think = of. Many thanks! dwayne --=20 Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .