Information Systems Development
This chapter focuses on the concepts surrounding the development of information systems. It begins with a discussion of software development methodologies, then covers programming languages and tools, and finishes with a review of implementation methodologies. As you read, reflect upon all the different pieces that must come together in order for a system to be developed.
Procedural vs. Object-Oriented
A procedural programming language is designed to allow a programmer to define a specific starting point for the program and then execute sequentially. All early programming languages worked this way. As user interfaces became more interactive and graphical, it made sense for programming languages to evolve to allow the user to have greater control over the flow of the program. An object-oriented programming language is designed so that the programmer defines "objects" that can take certain actions based on input from the user. In other words, a procedural program focuses on the sequence of activities to be performed while an object oriented program focuses on the different items being manipulated.