This book ¿Seven Wonders of Programming Languages¿ illustrates the review of popular programming languages viz COBOL, C, C++, Java, PASCAL, Perl & PYTHON. This book helps the researchers & programmers to know the theory of popular languages at a single point. The book presents a number of analytical tools for comparing & contrasting different languages & for seeing a particular language in a larger programming perspective. The book uses an easy to learn strategy where explanations are often drawn from simple English learning method to higher programming languages learning methodologies. The chapters are divided such that an introduction to languages is discussed & then move towards the programming constructs. Each language as ¿Seven Wonder of Programming Languages¿is discussed separately. In addition to description, the book will also seek explanations, programming constructs and rules associated with each language in an interesting way as "Seven Wonders of Programming Languages".