| Item | Obligations |
|---|---|
| Department of Defense | $161M |
| Department of Veterans Affairs | $136M |
| Department of the Treasury | $64.5M |
| General Services Administration | $51.3M |
| Department of Homeland Security | $23.9M |
| Department of Commerce | $11.2M |
| Department of Justice | $10.7M |
| Federal Communications Commission | $9.4M |
| Railroad Retirement Board | $4.1M |
| Department of Transportation | $1.6M |
Department of Defense is International Business Machines's largest federal customer, with $161M obligated (34.1% of the company's federal obligations).