Campus Location: Building 43
Sunday: Opens at 9am
Monday: 24 Hours (Presidents' Day)
Tuesday: 24 Hours
Wednesday: 24 Hours
Thursday: 24 Hours
Friday: Closes at 3am
Saturday: 9am to 2am
Hours Notes: After 5pm on weekdays and all day on weekends/holidays, you must show a Caltech ID, Caltech Library Borrower's Card, Caltech Library Guest Reader's Card, JPL badge, or Caltech Alumni Association ID card for access. After midnight, you must have a valid Caltech ID. For students interested in study space outside of the Library’s hours, please contact your Option Admin about access to your academic buildings.

Print Collection

  • Applied Sciences
  • Biology
  • Chemistry
  • Computer Science
  • Engineering
  • Mathematics
  • Physics


  • Reference Services
  • e-Device Checkout: Kindles, iPads, Laptops, Cameras
  • Group Study Rooms
  • PCs & Macs
  • Color Printers/Scanners/Copiers
  • Flatbed Scanners
  • Course Reserves
  • DocuServe & InterLibrary Loan
  • General Registration 
  • Bindery Service
  • Microfilm Reader 
  • Publish on Demand Service 
  • Reading Room