The Neil Hellman Library follows the Dewey Decimal Classification scheme whereby knowledge (subjects, disciplines) are organized numerically from 001 to 999. The field of Science (the 500s) is broken down as follows:
500 Natural sciences & mathematics
520 Astronomy & allied sciences
540 Chemistry & allied sciences
550 Earth sciences
580 Plants (Botany)
590 Animals (Zoology)
Of possible interest: Technology (Applied sciences)
600 Technology (General)
610 Medicine & health
620 Engineering & allied operations
630 Agriculture & related technologies
660 Chemical engineering
Each of the above is further divided by subtopic.
For searching specific subjects use the terms found in the Library of Congess Subject Authority Headings database. Copy-and-paste the most specific term found into the NHL catalog or other appropriate Db.
If any assistance is required, please contact the Reference Desk (ph.: 518.454.5181; txt.: 518-336-5277; e-mail: firstname.lastname@example.org); twt.: @NHLrefdesk).