This book thoroughly describes fundamentals of yarn laying on a package. It also describes mathematical equations related to various modes of winding, including random, precision and step precision winding, and focuses on fundamental aspects to be taken into considerations for building a winding package according to its end use applications (weaving, warping, knitting, pirn winding, sewing thread, embroidery, filter etc.). Fundamentals of yarn winding is written with a broader perspective so as to be a useful reference for a wider segment of textile industry. The book contains very good self-explanatory illustrations which will facilitate easy understanding of the content.