| CO | Existing Contract |
| KA | New Contract A new contract as opposed to a change to an existing contract or exercising of an option on an existing contract |
| KB | Contract Change Order A modification to an existing contract |
| KC | Price Revision A revision to a price established in a contract, triggered by a specific change to the contract |
| KD | Price Redetermination The redetermination of contract price triggered by a predetermined event or circumstance specified in the contract |
| KE | Letter Contract A contractual instrument, signed by a contracting officer which authorizes work to commence, but which must be definitized at a later date |
| KF | Unpriced Order An order whose price must be negotiated at a later date |
| KG | Other Contract Action A contract action that can neither be described using another existing code, nor one that has been previously mutually defined |
| PE | Program Estimate |
| RP | Request for Proposal |
| ZZ | Mutually Defined |