The Sixth variant of this by and large conspicuous book is proposed to familiarize its peruses with basic thoughts in Computer Science. PC Applications and Information Technology through a single book complete with different illustrative diagrams, sensible cases, segment plots, end-of-part request and glossary of key terms. PC Fundamentals is proposed to fill in as perusing material for various essential courses in Computer Science, Computer Applications, Information Technology and other related zones. Book Covers noteworthy subjects in the field, including Characteristics, Generations, Classification and Basic relationship of Computers Number systems, Computer Codes, Binary math, Boolean polynomial math and Logic Circuits Internal structure and working of CPUs, Memory, Secondary accumulating contraptions and I/O devices Commuter Software, its diverse sorts with outlines and for the most part used instruments and techniques for orchestrating change, execution and activity of programming structures. Peruse will find this discharge more accommodating than past variants in light of the way that :- New subjects and groupings are added to various segments, familiarizing pursuers with fresher unsettled areas in figuring The arrangement has been improved fundamentally to make the substance charming and less requesting to scrutinize Illustrative outlines and general plan are improved to make the substance engaging and clear to examine Lecture Notes CD substance is fittingly overhauled Size of the book is made helpful on contribution from pursuers.