| ELG | elongation |
| POPT | property optimization |
| FF | finite field |
| SCF | self-consistent field |
| NLO | non-linear optics |
| PFu | polyfuran |
| CMO | canonical molecular orbital |
| RLMO | regional localized molecular orbital |
| AO | atomic orbital |
| A-furan | acceptor-substituted furan |
| D-furan | donor-substituted furan |