▁package . ▁Em acs ▁includes ▁Or g - mode ▁as ▁a ▁major ▁mode ▁by ▁default . ▁Bast ien ▁Guer ry ▁is ▁the ▁current ▁maintain er , ▁in ▁co operation ▁with ▁an ▁active ▁development ▁community . ▁Since ▁its ▁success ▁in ▁Em acs , ▁some ▁other ▁systems ▁have ▁also ▁begun ▁providing ▁functions ▁to ▁work ▁with ▁org ▁files . ▁ ▁Al most ▁orth og on ally , ▁Or g - mode ▁has ▁functional ities ▁aim ed ▁at ▁executing ▁code ▁in ▁various ▁external ▁languages ▁; ▁these ▁functional ities ▁form ▁org - babel . ▁ ▁System ▁ ▁The ▁Or g - mode ▁home ▁page ▁explains ▁that ▁" at ▁its ▁core , ▁Or g - mode ▁is ▁a ▁simple ▁out lin er ▁for ▁note - t aking ▁and ▁list ▁management " ▁The ▁Or g ▁system ▁author ▁Car sten ▁Domin ik ▁explains ▁that ▁" Or g - mode ▁does ▁out lin ing , ▁note - t aking , ▁hyper links , ▁spread sheets , ▁TODO ▁lists , ▁project ▁planning , ▁GT D , ▁HTML ▁and ▁LaTeX ▁author ing , ▁all ▁with ▁plain ▁text ▁files ▁in ▁Em acs ." ▁ ▁The ▁Or g ▁system ▁is ▁based ▁on ▁plain ▁text ▁files ▁with ▁a ▁simple ▁markup , ▁which ▁makes ▁the ▁files ▁very ▁port able . ▁The ▁Linux ▁Information ▁Project ▁explains ▁that ▁" P lain ▁text ▁is ▁supported ▁by ▁nearly ▁every ▁application ▁program ▁on ▁every ▁operating ▁system ". ▁ ▁The ▁system ▁includes ▁a ▁light weight ▁markup ▁language ▁for ▁plain ▁text ▁files ▁( similar ▁in ▁function ▁to ▁Mark down , ▁re Struct ured Text ,