This book will be a supplement to the reader's basic knowledge in computers. It is enlightenment for the beginners on Hardware Parts, Operating Systems (Windows 95,98,2000, XP, Vista, 7, 8, 10 & MAC OS X) and the processes involved in them during installation. It also gives training to reader on online transactions like booking tickets, recharging mobile, shopping. The readers can earily do money transactions with the help of money transfer apps. It makes the readers to use Whatsapp on web. On the whole the authors provide the readers of this book an insight about Information Technology.