040000 tree 685fdfa0d985964e33c474af4c43995a791193d5	Data-Structures
040000 tree 58112ab1e7c9fe477161acc42c4788f2ec3c0daa	Expedited-Grace-Periods
040000 tree f63a2982a1c8bf6a13f3bccd1e4a4d03dbb3184f	Memory-Ordering
040000 tree 551bdbe860504172b338fa297d511ca42aec9560	Requirements