> In practice you have to compete with all other subjects, so you > will get less time for your class than you think is optimal That's fair enough and I can appreciate that My reasoning was one step past the classroom - the real-world applications your students are likely to want to use PICs for Motor control, keypads, clocks - 16F (or 18F) Interconnectivity, SMS, graphic LCDs - 18F probably more suitable 16 and 18 have more things in common than are actually 'different'. For example many of the differences are enhancements, like more choices for oscillator configuration. Would there be a way that you could cover the similarities and have a little time for the 18F's enhancements or would that just overwhelm your students ? Joe --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .