| Directory Name | Material Class | Number of Spectra | Number of Species | Number of Data Files |
| ANGL-RES | angle resolved XPS | >200 | 10 | 50 |
| CALIBRAT | oxygen and carbon capture - part I | >1800 | 42 | 44 |
| CAPTUR_1 | metal alloys, steels (as rec'd, & etched) | >500 | 44 | >80 |
| CAPTUR_2 | final condition from "captur_1" | 23 | 17 | 17 |
| CHRG_ALO | charge-up of aluminum oxide | >150 | 10 | 40 |
| CHRG_C | charge-up of adventitious carbon | >200 | 15 | >50 |
| CHRG_GRZ | charge-control using grazing X-rays | 120 | 5 | 30 |
| CHRG_RES | charge-control and charge-up research | >400 | 33 | >120 |
| DMG_ELEC | damage from flood gun electrons | >100 | 5 | 15 |
| DMG_ION | damage from argon ion beam | 90 | 12 | 25 |
| DMG_XRAY | damage from monochromatic X-rays | >500 | 23 | 28 |
| DPTH-PRO | depth profile examples | >5000 | 43 | >50 |
| ELEMETCH | pure elements after long ion etch | >3000 | 50 | 150 |
| ETCHRATE | etch rate calibrations using SiO2 | 200 | 1 | 5 |
| GAS-SNRS | gas sensors | 36 | 7 | 18 |
| GLOVE | glove induced contamination | >50 | 22 | 24 |
| GRAZINGX | grazing X-rays enhance count-rate | 90 | 3 | 45 |
| HD_LUBE1 | hard disk lubrication | 70 | 14 | 50 |
| HD_LUBE2 | hard disk lubrication | 84 | 42 | 84 |
| HEAT_EFF | effect of heat on materials | 20 | 2 | 5 |
| ION_IMPL | ion implanted materials (and profiles) | >300 | 12 | 30 |
| LASERXP1 | Laser-XPS research - part I | >350 | 21 | 168 |
| LASERXP2 | Laser-XPS research - part II | >300 | 23 | >150 |
| MAG_MEM | magnetic materials | 80 | 16 | 40 |
| MISC | miscellaneous materials | 140 | >25 | >25 |
| NTVOXFG1 | effect of flood gun on native oxides | >300 | 24 | >100 |
| NTVOXFG2 | effect of flood gun on native oxides | >250 | 21 | >100 |
| PELLET_R | research on making specimen pellets | 40 | 7 | 12 |
| SYSTMCHK | checks done on system behavior | 250 | 3 | 96 |
| TRANSMIS | spectrometer transmission studies | 50 | 3 | 16 |
| TRIBOLGY | tribology studies on bearings | 50 | 6 | 15 |
| UV_OZONE | UV with ozone treatments | 3 | 1 | 3 |
| | "Practical Studies" TOTALS | >14400 | >530 | >1640 |
