DATA STRUCTURE->(DATA STRUCTURES BY SEYMOUR LIPSCHUTZ) DIGITAL ELECTRONICS->(DIGITAL LOGIC AND COMPUTER DESIGN BY M.MORRIS MANO) CIRCUIT THEORY->(CIRCUIT THEORY BY A.CHAKRABARTI) PRINCIPLE OF PROGRAMMING LANGUAGE-> (LET US C BY KANETKAR),(OBJET ORIENTED PROGRAMMING IN C++ BY ROBERT LAFORE) COMPUTER ORGANISATION->(COMPUTER SYSTEM ARCHITECTURE BY M.MORRIS MANO)