Introduction to Software Engineering Software engineering is all about building quality software that meets people’s needs efficiently. Software plays two big roles today: As a product – it performs tasks like calculations, communication, or media handling. As a vehicle – it controls systems like operating systems, networks, or tools. Nature of Software Software is everywhere — from your phone to airplanes. Over time, it has grown more complex due to faster hardware, bigger memory, and smarter devices. But the same big questions remain: Why does software take so long to build? Why is it so expensive? Why can’t we fix all errors early? Why is maintenance so hard? Why is progress tough to measure? Types of Software Applications There are seven main categories of software: System Software – runs other programs (like compilers, editors). Application Software – solves specific tasks (e.g., billing systems). Engineering/Scientific Softwa...