ST N ▁was ▁no ▁longer ▁used ▁in ▁not ebook s . ▁Im prov ements ▁in ▁production ▁technology ▁meant ▁displays ▁became ▁larger , ▁sh ar per , ▁had ▁higher ▁native ▁resolution s , ▁faster ▁response ▁time ▁and ▁could ▁display ▁color ▁with ▁great ▁accuracy , ▁making ▁them ▁an ▁acceptable ▁substitute ▁for ▁a ▁traditional ▁C RT ▁monitor . ▁▁ ▁Im pro ved ▁storage ▁technology . ▁Early ▁la pt ops ▁and ▁port ables ▁had ▁only ▁flo ppy ▁disk ▁drives . ▁As ▁thin , ▁high - cap acity ▁hard ▁disk ▁drives ▁with ▁higher ▁reli ability ▁and ▁shock ▁resistance ▁and ▁lower ▁power ▁consumption ▁became ▁available , ▁users ▁could ▁store ▁their ▁work ▁on ▁laptop ▁computers ▁and ▁take ▁it ▁with ▁them . ▁The ▁ 3 . 5 " ▁H DD ▁was ▁created ▁initially ▁as ▁a ▁response ▁to ▁the ▁needs ▁of ▁not ebook ▁design ers ▁that ▁needed ▁smaller , ▁lower ▁power ▁consumption ▁products . ▁With ▁continu ing ▁pressure ▁to ▁shr ink ▁the ▁not ebook ▁size ▁even ▁further , ▁the ▁ 2 . 5 " ▁H DD ▁was ▁introduced . ▁One ▁La ptop ▁Per ▁Child ▁( OL PC ) ▁and ▁ ▁other ▁new ▁la pt ops ▁use ▁Flash ▁RAM ▁( non ▁vol atile , ▁non ▁mechanical ▁memory ▁device ) ▁instead ▁of ▁the ▁mechanical ▁hard ▁disk . ▁ ▁Im pro ved ▁connect ivity . ▁In ternal ▁mode ms ▁and ▁standard ▁serial , ▁parallel , ▁and ▁PS / 2 ▁ports ▁on ▁IBM ▁PC - compatible ▁la pt ops ▁made ▁it ▁easier ▁to ▁work ▁away ▁from ▁home ; ▁the ▁addition ▁of ▁network ▁ad ap ters ▁and