A History of the Lion City - Chapter from an online textbook.

The Syntax of Natural Language - an online textbook on transformational grammar.

Immunological Measures of Antigenicity (online textbook, see section 11.1.)

Molecular Cell Biology by Lodish et al. (online textbook)

An online textbook from the College of Liberal Arts, The University of Texas.

Several methods of instruction are used including traditional paper textbooks, online textbooks and virtual classrooms where students interact with teachers and peers.

The Modern Revolution in Physics - an online textbook.

Neuroscience - online textbook by Purves, et al.

Developmental Biology - 8th Edition by Scott Gilbert (online textbook)

Wave Optics - A chapter of an online textbook.