-EJournals
-Major Preprints

-Reference Resources
-Laboratories
-Data Sources

-Reference Resources
-Observatories
-Image Sources

Major Preprint Servers

• arXiv.org E-Print Archive
• SLAC SPIRES: HEP Preprint Database
• ICTP, Trieste, Italy - One-Shot World-Wide Preprints Search (Prototype)
• Astronomy & Astrophysics Preprints & Abstracts
• CERN Preprint Server
• Preprint Archive (Elsevier) - includes complete content from the following preprint servers: Chemistry, Mathematics, and Computer Science. No new submissions are accepted; archives only.
• E-print Network: Research Communication for Scientists and Engineers (was PrePRINT Network)- Searchable gateway to over 12,000 Web sites and databases worldwide.
• GrayLIT Network
• Institute for Mathematical Sciences Preprint Server
• Mathematical Physics Preprint Archive mp_arc
• University of Illinois Department of Mathematics Preprints