The Topical Group on Compression of Condensed Matter (GCCM) is a Unit of the American Physical Society (APS).^[1] The objective of the GCCM is the advancement and dissemination of knowledge on the physics of materials under high-pressure loading including shock physics, the effect of shock waves on materials, dynamic behavior of materials, and materials in extremes.^[2] Originally formed in 1984 as the Topical Group on the Shock Compression of Condensed Matter, the group has sponsored the Biennial International Conference on Shock Compression of Condensed Matter (SCCM)^[3] and awards the George E. Duvall Shock Compression Science Award.^[4] The Topical Group changed to its current name in 2023 to reflect a broader community including static high compression experiments.

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While specific topics and session names are set for each Biennial SCCM Conference, frequent topics include:

• Detonation and shock induced chemistry
• Energetic and reactive materials
• Equations of State
• Experimental developments
• First-principles and molecular dynamics
• Geophysics and planetary science
• Grain scale to continuum modeling
• High-energy density physics/Warm dense matter
• Inelastic deformations, fracture, and spall
• Materials Strength
• Particulate, porous, and composite materials
• Phase transitions
• Soft matter, polymers, and biomaterials

Recently one-off focused sessions have been organized on topics such as:

• X-ray free electron lasers and materials, Velocimetry diagnostic development, and Turbulence and Mixing^[5]
• Deep Carbon Budget, High Energy Density Materials, and Dynamic Response of Materials^[6]
• Post Shock Turbulence, Meso and Macro Scales, and Material Strength at High Pressure^[7]

The Topical Group publishes a series of Proceeds from the conferences, with the majority of proceedings published by the American Institute of Physics (1981, 1993 to 2011.)^[8] For the 2013 conference the proceeds was published by the Institute of Physics and was Open Access for the first time.^[9]