| Acronym | Meaning |
 | PCP | Photoelectric Charging Of Particles |
 | PDSA | Peroxydisulfuric Acid |
 | ECSC | European Coal And Steel Community |
 | EDXA | Energy-dispersive X-ray Analysis |
 | HSAB | Hard And Soft Acids And Bases |
 | SPEAR | Stanford Positron Electron Accelerating Ring |
 | FAT | Fatty Acid Translocase |
 | SEN | Submerged Entry Nozzle |
 | CCST | Complex Coordinate Scattering Theory |
 | EMT | Effective Mass Theory (in Electronic Wave Functions Calcn.) |