040000 tree 7e6d55c715f7cc2ab876e50d8db8fe5d5d7cf363	Data-Structures
040000 tree e37a9e3d84dff57d3913d0e183692f526ff2c19c	Expedited-Grace-Periods
040000 tree ef60772c4a2c73b57496356ab635fffd29db4cb3	Memory-Ordering
040000 tree 4e8eddf7ce05c18f836e4c0152c813722454e638	Requirements