The Keystone Library Network (KLN), founded in 1998, is a consortium of 18 libraries, including the 14 Pennsylvania State System of Higher Education's university libraries.^[1] The KLN provides its libraries with abstracts and access to 6,739 full-text journals and 10,000 business reports including country reports, industry reports, market research reports, and SWOT analyses.^[2]

The KLN maintains library catalogs of its members' holdings through Pennsylvania Inter-Library Online Technology (PILOT). The KLN enables users at each library to simultaneously search a group of shared resources provided by the KLN in addition to searching the individual library's locally subscribed resources.

• Bloomsburg University – Harvey A. Andruss Library
• California University of Pennsylvania – Louis L. Manderino Library
• Cheyney University – Leslie Pinckney Hill Library
• Clarion University – Carlson Library
  • Suhr Library
• East Stroudsburg University – Kemp Library
• Edinboro University – Baron-Forness Library
• Geneva College – McCartney Library
• Harrisburg University – Harrisburg University of Science and Technology Library
• Indiana University of Pennsylvania – Libraries
  • Cogswell Music Library
  • Rhoades B. Stabley Library
  • Patrick J. Stapleton Library
• Lincoln University (Pennsylvania) – Langston Hughes Memorial Library
• Kutztown University – Rohrbach Library
• Lock Haven University – Stevenson Library
• Mansfield University – North Hall Library
• Millersville University – Helen A. Ganser Library
• Shippensburg University – Lehman Library
• Slippery Rock University – Bailey Library
• Pennsylvania Department of Education – State Library of Pennsylvania
• West Chester University – Library Services
  • Francis Harvey Green Library
  • Presser Music Library