The new syllabus of DOE's various levels of courses, popularly called O-level, A-level, B-level and C-level is out. Keeping in mind the various developments taking place around the world in the field of computers, these syllabus include most of them. While keeping in mind the level of students studying the various levels, the degree of difficulties of the syllabus have been very well designed. I hope that after the new syllabus the courses would be as popular as they were before.There had been a long struggle between Training Institutes and Government Organizations, since these organizations would not recognize the degree/diploma given by them. Students passing out from these institutions were not given jobs based upon the said diplomas/degrees. Ultimately, the Government formed a society under the Department of Electronics, called DOEACC, who conducts tests and gives grades to the students irrespective of the institutes where they have studied. It is also possible to give the test without having any proper institutional studies. This is more or less on the terms of SAT and GRE conducted by USA. The only difference is that this is not online.There are fixed dates for the exams.The course for this has been designed for students to appear in the exams at various levels. These levels are O-level, A-level, B-level, C-level. The most popular among these is the O-level, since it is the entry level. Once you have cleared the O-level, you are eligible for a government job. Each course has been divided into various modules. Various books are available for various modules. This book is also made for you to prepare for the O-level course.This book has been written totally in accordance with the syllabus provided. Each chapter has been embedded with the screen shots for you to know what to expect on the screen, while running the application. Each chapter contains examples which can be attempted to supplement the reading. At the end of the chapter, there is a thorough revision of the text read. Not to mention of the questions provided in the beginning, both in the form of objective and subjective. The book also contains Sample papers which are based on the samples provided by DOEACC society. These would help you in preparing for the exams.