▁drives , ▁the ▁most ▁common ▁configuration ▁was ▁a ▁ 2 0 ▁MB ▁hard ▁drive ▁and ▁a ▁single ▁flo ppy ▁drive . ▁ ▁It ▁was ▁one ▁of ▁the ▁first ▁machines ▁with ▁a ▁ 1 . 4 4 ▁MB ▁density ▁ 3 . 5 - inch ▁disk ▁drive . ▁ ▁Cambridge ▁Z 8 8 ▁Another ▁notable ▁computer ▁was ▁the ▁ 8 - bit ▁Cambridge ▁Z 8 8 , ▁designed ▁by ▁C live ▁S inc la ir , ▁introduced ▁in ▁ 1 9 8 8 . ▁About ▁the ▁size ▁of ▁an ▁A 4 ▁sheet ▁of ▁paper ▁as ▁well , ▁it ▁ran ▁on ▁standard ▁batter ies , ▁and ▁contained ▁basic ▁spread sheet , ▁word ▁processing , ▁and ▁communic ations ▁programs . ▁It ▁anticip ated ▁the ▁future ▁mini atur ization ▁of ▁the ▁port able ▁computer , ▁and ▁as ▁a ▁R OM - based ▁machine ▁with ▁a ▁small ▁display , ▁can ▁– ▁like ▁the ▁TR S - 8 0 ▁Model ▁ 1 0 0 ▁– ▁also ▁be ▁seen ▁as ▁a ▁for er un ner ▁of ▁the ▁personal ▁digital ▁assistant . ▁ ▁Com pa q ▁S LT / 2 8 6 ▁By ▁the ▁end ▁of ▁the ▁ 1 9 8 0 s , ▁laptop ▁computers ▁were ▁becoming ▁popular ▁among ▁business ▁people . ▁The ▁ 1 6 - bit ▁CO MP A Q ▁S LT / 2 8 6 ▁deb uted ▁in ▁October ▁ 1 9 8 8 , ▁being ▁the ▁first ▁battery - power ed ▁laptop ▁to ▁support ▁an ▁internal ▁hard ▁disk ▁drive ▁and ▁a ▁V GA ▁compatible ▁L CD