well-behaved

adj. 1. Software that does its job quietly and without counterintuitive
effects. Esp.: said of software having an interface spec sufficiently simple
and well-defined that it can be used as a tool by other software. See cat.
2. Said of an algorithm that doesn't crash or blow up , even when given
pathological input. Implies that the stability of the algorithm is
intrinsic, which makes this somewhat different from bulletproof.