Recall the software engineering argument that complex software can only be mastered in developed progressively, extensively tested and then operated continually in a forgiving environment. What specific issue related to the environment could prevent the following systems from working? (i) Control software for a semi-autonomous Mars exploration rover. (ii) Software powering an online gambling site where users bet real money in a virtual roulette.

It's no secret that software development is an emerging field in engineering, but how does it differ from other types of engineering?