Materials engineer. I've worked on developing titanium extrusion processes, manufacturing/inspecting methods for new product, troubleshooting of issues, tested product to verify it meets standards etc. Now I'm doing a PhD in solid state welding of magnesium. Lots of interesting stuff, but a lot of time polishing tiny pieces of metal too. I'm amazed by how much time I spend fiddling with software, writing macros, matlab etc. I wish my undergrad had spent a bit more time on that and less on differential equations which I have never even used once.
Actually, has any one here ever used differential equations for anything practical/applied?