Yarn number is a measure of the fineness or size of a yarn expressed either as mass per unit length or length per unit. Yarn Count and Yarn Size are synonymous with Yarn Number.There are two systems of expressing yarn number or yarn count.

❶ Direct yarn numbering system (mass/unit length)

❷ Indirect yarn numbering system (length/unit mass)

A weave in which there are 2 ends and 2 picks in a repeat is called a plain weave. It has the smallest repeat 2 x2. Classification of plain weave: Approximately square cloth, Warp face cloth, Weft face twill, Balanced cloth, Unbalanced cloth.

Computer networks are collection of computer hardware & software that are interconnected and therefore help users to work togather .It connects computers , printers , scanners & cameras. Using computer network , user can send electronic massages to each other.