Windows Registry hives
| Name | Short name | Description |
|---|---|---|
| HKEY_CLASSES_ROOT | HKCR | Used by Windows 3.1, 9x/Me and NT 4 and later Refers to values in both HKEY_CURRENT_USER\Software\Classes and HKEY_LOCAL_MACHINE\Software\Classes |
| HKEY_CURRENT_CONFIG | HKCC | Used by Windows 9x/Me and NT 4 and later Refers to the current control set in HKLM |
| HKEY_CURRENT_USER | HKCU | Information regarding the current active user Used by Windows 9x/Me and NT 4 and later Refers to the active user key in HKEY_USERS |
| HKEY_DYN_DATA | Dynamic data Used by Windows 9x/Me |
|
| HKEY_LOCAL_MACHINE | HKLM | Local settings Used by Windows 9x/Me and NT 4 and later |
| HKEY_PERFORMANCE_DATA | Performance data Used by Windows NT 4 and later |
|
| HKEY_USERS | HKU | Information about all active users Used by Windows 9x/Me and NT 4 and later |