ish ▁Military ▁had ▁been ▁given ▁a ▁grant ▁through ▁the ▁Marshall ▁Plan ▁for ▁ci pher ▁machines ▁for ▁which ▁the ▁military ▁saw ▁no ▁immediate ▁need . ▁ ▁Origin ally ▁conce ived ▁to ▁be ▁a ▁copy ▁of ▁B ES K , ▁the ▁rapid ▁adv ancement ▁in ▁the ▁field ▁allowed ▁improvements ▁to ▁be ▁made ▁during ▁the ▁development ▁such ▁that ▁in ▁the ▁end , ▁it ▁was ▁not ▁a ▁copy ▁of ▁B ES K . ▁The ▁D AS K ▁was ▁a ▁one - off ▁design ▁that ▁took ▁place ▁in ▁a ▁villa . ▁The ▁machine ▁became ▁so ▁big ▁that ▁the ▁floor ▁had ▁to ▁be ▁rein for ced ▁to ▁support ▁its ▁mass ▁of ▁ 3 . 5 ▁metric ▁tons . ▁ ▁D AS K ▁is ▁notable ▁for ▁being ▁the ▁subject ▁of ▁one ▁of ▁the ▁earliest ▁AL G OL ▁implementations , ▁referred ▁to ▁as ▁D AS K ▁AL G OL , ▁which ▁counted ▁J ør n ▁J ensen ▁and ▁Peter ▁Na ur ▁among ▁its ▁contrib utors . ▁ ▁Architecture ▁The ▁D AS K ▁was ▁a ▁vac u um ▁t ube ▁machine ▁based ▁on ▁the ▁Swedish ▁B ES K ▁design . ▁As ▁described ▁in ▁ 1 9 5 6 , ▁it ▁contained ▁ 2 5 0 0 ▁vac u um ▁tub es , ▁ 1 5 0 0 ▁solid - state ▁elements , ▁and ▁required ▁a ▁three - phase ▁power ▁supply ▁of ▁at ▁least ▁ 1 5   k W . ▁ ▁Fast ▁storage ▁was ▁ 1 0 2 4 ▁ 4 0 - bit ▁words ▁of ▁magnetic ▁core ▁memory ▁( cycle ▁time