I think that is it, I guess it is called "program structure" or maybe it is just called software. If I can understand it I would like the specifics on each charger. I do notice that the triton and digital piranha is very very similar. The mrc chargers are very similar to each other also and have a bunch of safeties built in. They will stop for a number of reasons: I , of course , want to know the exact formulas,,,