- **CUS** This custom key requires special actions to activate or install.
- **MAK** This volume license key (MAK) allows multiple activations.\*\*
- **RTL** This retail key allows multiple activations.\*\*
- **STA** This setup key bypasses activation.
- **VL1** This is a VA 1.0 key
- **OEM** This is an Original Equipment Manufacturer key that allows multiple activations.
- **AAA** This retail key is for AA\* programs and allows one activation. These keys are issued in batches.
- **AAL** This lab use key is for AA programs and allows multiple activations.\*\*
- **AAM** This is a multiple activation key for AA program customers.
- **AV1** This volume license key (VA 1.0) is for AA programs and allows multiple installations.\*\*
- **AV2** This volume license key (KMS) is for Academic Alliance programs.