The book covers the entire course contents of the syllabus of computer Science (Class XII) (code083) prescribed by central Board of Secondary Education (C.B.S.E) in a clear and simple English language. It presents a detailed discussion on object Oriented Programming concepts using C++ language. It gives detailed description of data structures like arrays, linked lists, stacks and queues in a clear and systematic manner. The concepts of database and use of structured query language (SQL), Boolean logic, communication technology and open Source concepts are described in easytounderstand style. Programming in C++ language is explained with many examples. The accompanied CD contains C++ programs discussed in the book. These programs can be loaded directly and can be used without spending time in typing them.