I'd hope so. Every time you get on a plane you're trusting the answers returned by Mathematica :-)

Probably MATLAB instead of Mathematica. Control Systems, Communication Systems, Structural Engineering, Engines, Vibration Analysis,... all within MATLAB's domain, right? Am I missing something?

MATLAB certainly is the leader in the field, but Mathematica does finite element, control systems, etc.

Anyway, the point is, when it comes to being "trusted" there are a lot of software companies and products who Google doesn't really compare to.

As any other engineer, I have used MATLAB quite a lot. Unfortunately I am not as familiarized with Mathematica. I thought Mathematica was mostly symbolic computation. I didn't know it did numerical computation (such as FEM) as well. Thanks for the info!