A computer is a very complex machine comprised of numerous parts, cables, and devices that all need to properly work together in order for the computer to operate correctly.Similarly, computer networks have had a profound effect on the way we communicate with each other. And in this introductory book, we have considered database fundamental definitions which are mandatory for all. It will motivate all the learners for knowing about how to develop and maintain databases that meet user requirements. Windows Operating System, Microsoft Word, Excel, and PowerPoint are brilliant tools with many applications that are helpful to students and teachers in education. In this introductory Book, different screenshots are taken and presented for learners to enhance their practical skill, so that they can use each and every feature efficiently and effectively. The lessons were designed to help you understand and use Microsoft Word, Excel and PowerPoint to the fullest potential of the program.