124 страниц. 2012 год. LAP Lambert Academic Publishing This book discusses the evolution of computer from the first generation up to the present generation. It also delved deeply on computer viruses, the maintenance of computer, hardware and software troubleshooting of computer system. An expert system was designed to cater for the easy access to the solution of the troubleshooting performed on the computer system. This book is recommended to computer students, computer technicians and individuals who just want to have deeper knowledge of computer science as a course and as a guide to easy diagnoses and solution to the common problems being encountering everyday as pertaining to our computer system.