What is mean by RAC GNWL RAC RLWL PQWL REGRET WL CNF Confirmed CAN MOD in Railway ticket?

Link	Symbol	Description
!	CAN / MOD	Cancelled or Modified Passenger
!	CNF / Confirmed	Confirmed (Coach/Berth number will be available after chart preparation)
!	RAC	Reservation Against Cancellation
!	WL #	Waiting List Number
!	RLWL	Remote Location Wait List
!	GNWL	General Wait List
!	PQWL	Pooled Quota Wait List
!	REGRET/WL	No More Booking Permitted
!	RELEASED	Ticket Not Cancelled but Alternative Accommodation Provided
!	R# #	RAC Coach Number Berth Number

What is mean by RAC GNWL RAC RLWL PQWL REGRET WL CNF Confirmed CAN MOD in Railway ticket?