First gives an introduction to computers. This provides an overview of anatomy, generation and classification of computers. In addition to this, it discusses about the personal computers, booting and viruses. Second entitled "Operating Systems" describes about disk operating system and its commands. three discusses Working in Windows. four describes word processing and creating, saving, opening and editing a document. Besides formatting options has also been described in four. Introduction to Ms-Excel and creating, editing and saving a document are explained in five and six. seven describes Mathematical Functions and their use in excel. The various features of data analysis using excel which deals with data analysis tools, tests, graphs and ANOVA along with illustrated examples are described in eight and nine. The tenth introduces the reader with Ms-Access database. number eleven gives the basic concepts of internet. number twelve discusses with pictures flow chart and algorithm.