name "system-call interface module" dir system end name "string routines module" dir string end name "formatted print module" dir print end name "assertion module" dir assert end name "memory allocation module" dir alloc end name "fast, linear time malloc" dir malloc end name "identifier table module" dir idf end name "input module" dir input end name "ACK-object reading and writing module" dir object end name "EM-code reading module" dir read_em end name "EM code generation module" dir em_code end name "EM messages generation module" dir em_mes end