Work is feeling by educated.Work is not calling by educated.

An engineer can't study all world systems in his lifetime.
But he can generalise all world systems as four stages.
1.control systems;
2.power devices;
3.machine design;and
4.building structures.
After generalisation,he has specialisation to become senior.
My elective is specialisation in social philosophy(an interdisciplinary specialisation of all engineering branches).