| Acronym | Meaning |
| (PI)SDCI | (pi)-electron Singly And Doubly Excited CI |
| LST | Local Solar Time |
| NFAIS | National Federation Of Abstracting And Information Services |
| LRCI | Low-rank Configuration Interaction |
| LMTO | Linear Muffin-tin Orbital |
| VCSEL | Vertical Cavity Surface Emitting Laser |
| HZ | Hertz (one Cycle Per Second) |
| FLISA | Fluorescence-linked Immunosorbent Assay |
| SOIC | Small Outline Integrated Circuit |
| AGU | American Geophysical Union |