Programmers' FAQ Save
A small series 3a/SIBO programming FAQ.
http://www.aha.ru/~kis/progfaq.htm   

Twiddlebit Software Save
Twiddlebit Software: OPL development tools and OPXs (OPP, OPPDBG, GPRINTER.OPX)
http://www.twiddlebit.com/   

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