This book having title on “Introduction to Computer applications” is a step-by-step exploration of Computer systems, its structural understanding including study on Software’s and components covering the Hardware’s. More than just an Introduction to Computer Applications, this book also gives a broad understanding of Database Management, it’s language and also a comprehensive comparison of traditional file systems with the relational databases. The textbook’s pedagogical approach is to introduce computing concepts and Data base management system in a breadth-first manner. In the first chapter, you will understand the fundamentals of Computer System covering components of a computer system, various generations of computer languages and various computing environments. It will also cover details on software’s and it’s available packages. Second chapter , you will explore disk operating system and windows operating system. It will elaborate the complete working with Windows Operating System. At the conclusion you will also understand various number system and codes. In Chapter Third , you will understand basics of Database Management System and will also do a structural comparison of traditional files systems and Data Base Management System. We will also understand the Architecture of Database Management System. In Chapter four, you will understand available database languages including SQL. It will also help you along with basics of data processing explain the six stages. In Chapter five, it will cover Data Hierarchy, Data File structure and aspects of data file organization which will include the discussion on Master and Transaction files thereby understanding the management of data. In Chapter Six, you will discuss the basics of word processing in computer applications covering creation of documents and editing of word documents in details. In Seventh Chapter , you will understand the formatting of texts and Images in details and printing of documents in MS Word. In Eighth Chapter , you will explore the fundamentals of computer networks communication precisely understanding LAN, WAN and MAN