▁fol ded ▁up ▁into ▁a ▁lug gable ▁case ▁the ▁size ▁of ▁a ▁port able ▁se wing ▁machine , ▁similar ▁in ▁size ▁to ▁the ▁Os bourne ▁ 1 . ▁The ▁third ▁model ▁of ▁this ▁development , ▁Com pa q ▁Port able ▁II , ▁featured ▁high ▁resolution ▁graphics ▁on ▁its ▁t ube ▁display . ▁It ▁was ▁the ▁first ▁port able ▁computer ▁ready ▁to ▁be ▁used ▁on ▁the ▁shop ▁floor , ▁and ▁for ▁C AD ▁and ▁diagram ▁display . ▁It ▁established ▁Com pa q ▁as ▁a ▁major ▁brand ▁on ▁the ▁market . ▁ ▁E pson ▁H X - 2 0 ▁ ▁The ▁first ▁significant ▁development ▁towards ▁laptop ▁computing ▁was ▁announced ▁in ▁ 1 9 8 1 ▁and ▁sold ▁from ▁July ▁ 1 9 8 2 , ▁the ▁ 8 / 1 6 - bit ▁E pson ▁H X - 2 0 . ▁It ▁featured ▁a ▁full - trans it ▁ 6 8 - key ▁keyboard , ▁re charge able ▁nick el - c ad m ium ▁batter ies , ▁a ▁small ▁( 1 2 0 × 3 2 - p ixel ) ▁dot - matrix ▁L CD ▁with ▁ 4   lines ▁of ▁text , ▁ 2 0   char acters ▁per ▁line ▁text ▁mode , ▁a ▁ 2 4   column ▁dot ▁matrix ▁printer , ▁a ▁Microsoft ▁B AS IC ▁interpreter , ▁and ▁ 1 6   KB ▁of ▁RAM ▁( expand able ▁to ▁ 3 2   KB ). ▁The ▁H X - 2 0 ' s ▁very ▁limited ▁screen , ▁tiny ▁internal ▁memory