Cambridge University has recently made some of Isaac Newton’s important notebooks and papers online. The collection includes his *Trinity College Notebook*, *Waste Notebook* where he developed most of calculus concepts, * Laboratory Notebook*, *Principia Mathematica*, and several of his notes in mathematics, hydrostatics, optics, alchemy, and chemistry.

These notes can be viewed and explored at the Cambridge Digital Library. The notebook images can be downloaded under Creative Common license.