| 01 | Research, Development, Test & Evaluation (RDT&E) |
| 02 | Production |
| 03 | Both RDT&E and Production |
| 04 | Other |
| 05 | Procurement |
| 06 | Advanced Design |
| 07 | Full Scale Development |
| 08 | Engineering and Manufacturing Development (EMD) |
| 11 | Single Family |
| 12 | Manufactured Housing |
| 13 | Multifamily Construction |
| 14 | Multifamily Project |
| 15 | Single Family Serial Note |
| 16 | Custom Adjustable Rate Mortgage |
| 20 | Concept Exploration |
| 21 | Demonstration Validation |
| 22 | Deployment |
| 23 | Low Rate Initial Production |
| AR | Adjustable Rate Mortgages |
| AZ | Custom Adjustable Rate Mortgage |
| BD | Buydowns |
| CL | Construction Loan; Multifamily |
| CS | Construction Loan with Split Interest Rate |
| GA | Growing Equity Mortgage--Monthly Payments Increase 4% Annually Over the Life of the Loan |
| GD | Growing Equity Mortgage--Monthly Payments Increase Annually at any Rate over the life of the Loan |
| GP | Graduated Payment Mortgage--Monthly Payments Increase Annually for no more than the first 5 years of the Mortgage |
| GT | Graduated Payment Mortgage--Monthly Payments Increase Annually for no more than the first 10 years of the Mortgage |
| MH | Manufactured Housing |
| PL | Project Loan; Multifamily |
| PN | Project Loan with Non-Level Payments |
| SF | Single Family Level Payment Mortgage |
| SN | Serial Notes |