The Colon Classification Has Been Considered As One Of The Most Important Contributions Of Its Authors To The Field Of Library Classification. This Manual Tries To Explain The Facet Formula Of Every Main Subject, Adjunct Basic Subjects, The Rules And Provides Suitable Examples To Illustrate Various Points. Besides It Has An Additional Feature That After The Discussion Of Every Basic Subject There Is Given An Exercise For Practice For Students, With Solved And Graded Examples For Practice.