Most (if not all) of us here realise the value of proper technical documentation, schematics, source listings, etc. It therefore surpises me that people write programs to support classic computers and _don't_ release the source code. Ditto for stuff for amateur radio (which according to my license is for 'self training in wireless telegraphy', it's a lot easier to learn about how something works if you have the sourc code for the programs involved....