Difference in registry key for Windows

This topic is common to all . I found its very interesting . It will be helpful to Windows oracle APPS customer.

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet

ControlSet001 = Set of boot information used to boot the system.

ControlSet002 = Set of boot information used for “Last Known
Good” configuration.

CurrentControlSet = Maps to either 001 or 002 above, depending
on how the system was booted. All edits should be done to this set,
as doing so will assure you’re modifying whichever control set is
currently in force.