NASA astrophysics data system - http://adswww.harvard.edu/

NASW clinical register - http://www.naswdc.org/register/default.asp 

Naxos music library - http://www.naxosmusiclibrary.com/

NBER working papers - http://www.nber.org/papers/

NC State University MSDS Management System -
http://www.ncsu.edu/ehs/MSDS.htm

NCCS data web - http://nccsdataweb.urban.org/

NCJRS abstracts database - http://www.ncjrs.gov/abstractdb/Search.asp

NCSU Libraries Design Library image collection – 
http://www.lib.ncsu.edu/design

NCSU Scholarly Publications Repository - 
http://www.lib.ncsu.edu/repository/scholpubs/search.php

Newspaper source - http://www.nclive.org/

NIST chemistry webbook - http://webbook.nist.gov/chemistry/ 

Noncode - http://noncode.bioinfor.org.cn/index.htm

North American women's letters and diaries - http://www.nclive.org/

North Carolina periodicals index - http://www.ecu.edu/

NoveList, your guide to fiction - http://www.nclive.org/

NTIS - http://www.engineeringvillage2.com/ 

NTRS, NASA technical reports server - http://ntrs.nasa.gov/

Nuclear science information of Japan. Oral presentation - 
http://nsij-op.jaea.go.jp/