| Item | Obligations |
|---|---|
| Facilities Support Services | $25.3B |
| Research and Development in the Physical, Engineering, and Life Sciences | $8.1B |
| Remediation Services | $3.7B |
| Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | $3.6B |
| Other Basic Inorganic Chemical Manufacturing | $2.9B |
| All Other Professional, Scientific, and Technical Services | $2.4B |
| Unknown | $1.1B |
| Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) | $844M |
| Hazardous Waste Treatment and Disposal | $787M |
| Research and Development in Biotechnology | $763M |
Facilities Support Services was Energy's largest contract category, with $25.3B obligated (48.0% of contract spending).