040000 tree 297a3154b695010445e5137e340fef06942af862	algebra
040000 tree d160ef44528a8a62b6a5886ab2fea35d898eefd9	compiler
040000 tree 3773c0cbae6cc8803dbea091d43b98a02e91a3b1	jobgen
040000 tree 58d52c3fb63dcdd5f20318658a62f1d5a91b87b3	optimizer
040000 tree 6c962c5a6cf83bb00f082df9c486b5d442ad1b33	translator