| ASG | Atom assignment file extension. It is intended to store the atom assignments between the chemical shifts and chemical structures. |
| ASL | Adaptive spectral library file. ASL files are special case of parameter files which are intended to use in quantitative quantum mechanical analysis. |
| PMR | Parameter file. |
| QMT | Quantum mechanical transition file. Contains observed and predicted spectra. |
| RF | Response factor. |
| SDF | Structure data file is one of a family of chemical-data file formats developed by MDL. It is intended especially for structural information. |
| TMP | Temporary parameter file. TMP files are used in the interaction mechanism between ChemAdder and SpinAdder. |
| *RF | Profile files that are used in the interaction mechanism between the ChemAdder and SpinAdder. The profile file extensions are derived from the parameter file extensions. For example: glucose.pmr → glucose.prf, glucose.asl → glucose.arf, glucose.11th → glucose.11rf. |
| *ST | Parameter file extension: 1st, 21st, 31st, etc. |
| *ND | Parameter file extension: 2nd, 22nd, 32nd, etc. |
| *RD | Parameter file extension: 3rd, 23rd, 33rd, etc. |
| *TH | Parameter file extension: 4th, 5th, 6th, etc. |