What is software engineering?

Software engineering: 

Software engineering is, however, the study and an application of engineering to the design, development and maintenance of software.

“Software engineering is the establishment and use of sound engineering principles in order to the obtain economically software that is reliable and works efficiently on real machines”.- Fritz Bauer

The IEEE (Institute of Electrical and Electronics Engineers) definition of software engineering

    1.       The application of a systematic, disciplined, quantifiable approach to the development, operation and maintenance of software, that is the application of engineering to software.

     2.       The study of the approaches as in (1)