We feel immense pleasure in presenting to you the latest and completely revised “fourteenth edition” of this book named “Simple Computer Science Class-11”. We thank all of you for making the ‘thirteenth edition’ a success. In the present edition, all those errors have been removed, which were left in the thirteenth edition for some reason. Some latest information has also been included in the edition. Answers according to the latest syllabus prescribed by the state Board of Secondary Education are present in this edition.