A little thing in world econ.

Yesterday, I learned a lot from my Econ class. My teacher tough me about the elastic demand types that have 4 types which are Elastic , inelastic , perfect elastic and perfect inelastic.Moreover, I learned about 'Marginal cost' . I just know that the opportunities cost are so many important thing to think before open my own business as well. The other knowleadge fields outside of my Computer world are so great. I like to learn a lot more than this :) One day I could be a Doctor, I hope....