The modern world has witnessed many wonderful inventions and computer is one of them, which has greatly in influenced and changed the human psychology and lifestyle. Thus, it is necessary for everyone to have the knowledge of each important technical word relating to computer application. In the present dictionary meaning of important technical words are explained in a very simple manner. The dictionary is prepared specifically for BCA and MCA students of our country, but it is also useful to B.Com, BBA, BCA, M.Sec. M.Com, MBA , CA, ICWA and CS students of our country.