Online Cataloguing is a major issue in library automation and networking. Our Librarians are using various types of library automation softwres to automate their libraries. CDS/ISIS is one of the most popular and user friendly sortware developed by UNESCOfor the application in the libraries of developing countries of the world. The purpose of this handbook is to highlight the practical approach o f CDS/ISIS Windows version. This work is the first of its kind because no book is currently available to help the users in regards to using the Windows version of CDS/ISIS. this will certainly help the community of working librarians as well as students of library science.