Subclass Q: General Science
Mathematics is the study of quantity, structure, space, and change. Works held here relate to mathematics, mathematicians, and the specific forms of the field, such as algebra, calculus, geometry, and so forth.
Examples: An Essay on Quantity (Thomas Reid, 1748), Early Hindoo Mathematics (Edward Singleton Holden, 1873), The Origin and Curiosities of the Arabic Numerals (D. V. T. Qua, 1877), Squaring the circle (Srinivasa Ramanujan, 1913).
Subclass QH: Natural History and Biology
Subclass QM: Human Anatomy
Subclass QR: Microbiology