This reference manual is the most comprehensive and authoritative book on computer awareness available in a single volume. It is prepared for those aspirants who have never studied computer subject during their schooling and have little knowledge about it. The present book aims to provide a thorough account of the type of questions asked in various competitive examinations like DOEACC' (NIELIT), CCC & BCC Exam, IBPS' Banking PO and Clerical Exam, etc. while also providing the details of the above mentioned examinations, application requirements, regional centres conducting the exams, eligibility criteria and general instructions for clarity of the readers. This all-in-one reference manual will boost your confidence to crack your exams with the relevant guidance that it provides.