040000 tree 7b2fd927c078f9aa8722466396777600e291b007	architecture
040000 tree a089d0082ad0cb36cebaf1df5234b24e73986735	configuration
040000 tree 98aaf9349991009549879d1f822bdab5702641a9	development
040000 tree 998f3b63b5549fbceb4215c49deefc82cec62d19	installation