The LBBL uses the Library of Congress Classification System. Books on Biology are located in QH-QR, on the 3rd floor of the library.
- QH1-278.5 Natural history (General)
- QH1-(199.5) General Including nature conservation, geographical distribution
- QH201-278.5 Microscopy
- QH301-705.5 Biology (General)
- QH359-425 Evolution
- QH426-470 Genetics
- QH471-489 Reproduction
- QH501-531 Life
- QH540-549.5 Ecology
- QH573-671 Cytology
- QH705-705.5 Economic biology
- QK1-989 Botany
- QK1-474.5 General Including geographical distribution
- QK474.8-495 Spermatophyta. Phanerogams
- QK494-494.5 Gymnosperms QK495 Angiosperms
- QK504-(638) Cryptogams QK640-(707) Plant anatomy
- QK710-899 Plant physiology
- QK900-989 Plant ecology
- QL1-991 Zoology
- QL1-355 General Including geographical distribution
- QL360-599.82 Invertebrates
- QL461-599.82 Insects
- QL605-739.8 Chordates. Vertebrates
- QL614-639.8 Fishes QL640-669.3 Reptiles and amphibians
- QL671-699 Birds
- QL700-739.8 Mammals
- QL750-795 Animal behavior
- QL791-795 Stories and anecdotes
- QL799-799.5 Morphology
- QL801-950.9 Anatomy
- QL951-991 Embryology
- QM1-695 Human anatomy
- QM1-511 General
- QM531-549 Regional anatomy
- QM550-577.8 Human and comparative histology
- QM601-695 Human embryology
- QP1-(981) Physiology
- QP1-345 General Including influence of the environment
- QP351-495 Neurophysiology and neuropsychology
- QP501-801 Animal biochemistry
- QP(901)-(981) Experimental pharmacology
- QR1-502 Microbiology
- QR1-74.5 General
- QR75-99.5 Bacteria
- QR99.6-99.8 Cyanobacteria
- QR100-130 Microbial ecology
- QR171 Microorganisms in the animal body
- QR180-189.5 Immunology
- QR355-502 Virology