P

Mathematics & science.

PB

Mathematics. Calculus, geometry, history.

PBK

Calculus & mathematical analysis.

PBM

Geometry.

PBX

History of mathematics.

PD

Science: general issues. General issues: History of science.

PDX

History of science.

PG

Astronomy, space & time.

PGC

Theoretical & mathematical astronomy.

PH

Physics.Mechanics, optical physics…

PH

Physics.

PHD

Classical mechanics.

PHJ

Optical physics.

PN

Chemistry.

PS

Biology, life sciences. Botany, zoology…

PST

Botany & plant sciences.

PSV

Zoology & animal sciences.

PSVW5

Reptiles.