man pages section 3: Library Interfaces and Headers
    
N
 
 ndbm — definitions for ndbm database operations ( Index Term Link )
 
 netdb — definitions for network database operations ( Index Term Link )
  Default ( Index Term Link )
  Standard-conforming ( Index Term Link )
 
 network services library — libnsl ( Index Term Link )
 
 nl_types — native language data types ( Index Term Link )