Engineering is the stream wherein one acquires and applies scientific, mathematical, economic, social, and practical knowledge, in order to design and build structures, machines, devices, systems, materials and processes that make human life better and easier.
Engineering has around 70 to 72 specializations that one can choose from including the hydraulic engineering,petrochemical engineering,finance engineering etc.
In order to some to a decision on which specialization to choose from its advisable that you log on to http://www.youngbuzz.com/careers/career-options which will give information on all the various streams.
Also speak to professionals who are into the field which will help you get first-hand information on what is their industry all about.
This will more or less help you come to an informed decision.