Computing Review Subject Classification System (1964, obsolete)

3.1 Natural Sciences

• 3.10 General
• 3.11 Astronomy; Space
• 3.12 Biology
• 3.13 Chemistry
• 3.14 Earth Sciences
• 3.15 Mathematics; Number Theory
• 3.16 Meteorology
• 3.17 Physics; Nuclear Sciences
• 3.19 Miscellaneous