| Acronym | Meaning |
| AIUPS | Angle-integrated Ultraviolet Photoelectron Spectroscopy |
| ACO | Atomic-cell Orbital |
| PAM | Peptidylglycine Alpha-amidating Monooxygenase |
| NIST | National Institute Of Standards And Technology (formerly NBS) |
| CBLM | Cluster-bethe-lattice Method (for Electronic-structure Calcns. On Crystals) |
| NAMF | Non-asbestos Mineral Fibers |
| ICZN | International Commission On Zoological Nomenclature |
| PSEM | Point Source Exposure Model |
| AMORS | Atomic Magnetooptic Resonance Spectroscopy |
| RSC | Relative Source Contribution |