Unix man pages are divided up into a number of sections

SectionContentsPages on server
1Executable programs and shell commands entries avaiable
2System calls entries avaiable
3Library calls entries avaiable
4Special files entries avaiable
5File formants and conventions entries avaiable
6Games entries avaiable
7Miscellaneous entries avaiable
8System administration commands entries avaiable
9Kernel routines (Non standard) entries avaiable