Many historical newspapers are not available online, so be sure to look at the "finding magazines in text" link as well.

• U.S. newspaper articles published since the early 1980s: try one of the following databases, all of which include full text articles from hundreds of newspapers: Lexis-Nexis (includes the New York Times), Factiva (Includes the Wall Street Journal) or Newsbank (Includes the Philadelphia Inquirer).
• U.S. newspaper articles published before the early 1980s:Try Proquest Historical Newspapers, 1851-2003 (New York Times, Wall Street Journal, Los Angeles Times, Chicago Defender), Early American Newspapers, (1690-1900), African American Newspapers: The 19th Century, and Historical Newspapers Online.
• Foreign newspaper articles published since 1978:Try Factiva or Lexis-Nexis (both mid-1980s-present), World News Connection (1994-present) or the FBIS daily reports research guide.
• Also see this research guide: Finding Newspapers at Penn.