Charles Sanders Peirce. Internet links:

Arisbe Joseph Ransdell's excellent site on Peirce

Biography and Bibliography from the Peirce Society.

C. S. Peirce by Robert Burch.

Peirce's logic by Eric M. Hammer.

Benjamin Peirce by Ivor Grattan-Guinness and Alison Walsh.

The Oxford Companion to Philosophy. C. J. Hookway's article

Related OCP articles on: abduction, American philosophy, Harvard philosophy, indexicals, pragmaticism, the pragmatic theory of truth, pragmatism, semiotics, and sign and symbol

The Peirce Edition Project.

EpistemeLinks.com.

Columbia Encyclopedia at Bartleby.com

Virtuality A paper by Peter Skagestad

Treasure Trove of Scientific Biography Eric Weisstein's discussion

Peirce in Oxford's Concise Dictionary of Linguistics

Symbol in Oxford's Concise Dictionary of Linguistics

Mathematical MacTutor A discussion of Peirce's mathematical significance

The Macmillan Encyclopedia 2001 a brief article

Phoenix