Listed below are PACS 2001 categories, which will link to the specific section. 

PACS Category 00: General

PACS Category 10: The Physics of Elementary Particles and Fields

PACS Category 20: Nuclear Physics

PACS Category 30: Atomic and Molecular Physics

PACS Category 40: Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics

PACS Category 50: Physics of Gases, Plasmas, and Electric Discharges

PACS Category 60: Condensed Matter: Structure, Mechanical and Thermal  Properties

PACS Category 70: Condensed Matter: Electronic Structure, Electrical, Magnetic, and Optical Properties

PACS Category 80: Interdisciplinary Physics and Related Areas of Science and Technology

PACS Category 90: Geophysics, Astronomy, and Astrophysics

PACS Appendix to 43: Acoustics