▁highly ▁comput able ▁form ▁( See ▁S NO ME D ▁CT ): ▁a ▁directed ▁a cyc lic ▁graph ▁anch ored ▁in ▁formal ▁representation ▁logic . ▁In ▁ 2 0 0 7 , ▁the ▁newly ▁formed ▁International ▁Health ▁Term in ology ▁Stand ards ▁Development ▁Organisation ▁( I HT S DO ) ▁acquired ▁all ▁the ▁Intel lect ual ▁Property ▁of ▁S NO ME D ▁CT ▁and ▁all ▁ante ced ent ▁S NO ME D ▁versions . ▁ ▁Br ief ▁tim eline : ▁▁ 1 9 6 5 ▁SN OP ▁▁ 1 9 7 4 ▁S NO ME D ▁▁ 1 9 7 9 ▁S NO ME D ▁II ▁▁ 1 9 9 3 ▁S NO ME D ▁International ▁ 3 . 0 ▁▁ 1 9 9 5 ▁S NO ME D ▁Micro gl oss ary ▁of ▁Sign s ▁and ▁Sym pt oms ▁▁ 1 9 9 3 - 9 8 ▁S NO ME D ▁International ▁versions ▁ 3 . 1 - 3 . 5 ▁▁ 2 0 0 2 ▁First ▁release ▁of ▁S NO ME D ▁CT ▁▁ 2 0 0 7 ▁All ▁versions ▁of ▁S NO ME D ▁acquired ▁by ▁I HT S DO ▁▁ 2 0 1 7 ▁All ▁S NO ME D ▁versions ▁except ▁S NO ME D ▁CT ▁have ▁been ▁formally ▁deprecated ▁by ▁I HT S DO ▁ ▁Reference ▁ont ology ▁S NO ME D ▁was ▁designed ▁from ▁its ▁in ception ▁with ▁complex ▁concepts ▁defined ▁in ▁terms ▁of ▁simpler ▁ones . ▁For ▁example , ▁a ▁disease ▁can ▁be ▁defined ▁in ▁terms