▁in ▁the ▁laptop / port able ▁sphere . ▁ ▁Power book ▁The ▁Apple ▁Power Book ▁series , ▁introduced ▁in ▁October ▁ 1 9 9 1 , ▁pione ered ▁changes ▁that ▁are ▁now ▁de ▁fact o ▁standards ▁on ▁la pt ops , ▁including ▁room ▁for ▁a ▁pal m ▁rest . ▁The ▁following ▁year , ▁IBM ▁released ▁its ▁Think Pad ▁ 7 0 0 C , ▁featuring ▁a ▁similar ▁design ▁( though ▁with ▁a ▁distinct ive ▁red ▁Track Point ▁pointing ▁device ). ▁▁ ▁Later ▁Power Book s ▁featured ▁optional ▁color ▁displays ▁( Power Book ▁ 1 6 5 c , ▁ 1 9 9 3 ), ▁and ▁first ▁true ▁touch pad ▁( Power Book ▁ 5 0 0 ▁series , ▁ 1 9 9 4 ), ▁first ▁ 1 6 - bit ▁s tere o ▁audio , ▁and ▁first ▁built - in ▁E ther net ▁network ▁adapter ▁( Power Book ▁ 5 0 0 , ▁ 1 9 9 4 ). ▁ ▁AP M ▁and ▁S MI / S MM ▁Windows ▁ 3 . 1 ▁was ▁the ▁first ▁version ▁of ▁Windows ▁to ▁support ▁AP M , ▁which ▁was ▁usually ▁implemented ▁with ▁S MI ▁in ▁the ▁B IOS ▁( int rodu ced ▁with ▁the ▁Intel ▁ 8 0 3 8 6 SL ). ▁Windows ▁ 9 5 ▁introduced ▁standard ized ▁support ▁for ▁dock ing ▁via ▁the ▁P n P ▁B IOS ▁( am ong ▁other ▁things ). ▁Prior ▁to ▁this ▁point ▁each ▁brand ▁used ▁custom ▁B IOS , ▁drivers ▁and ▁in ▁some ▁cases , ▁AS IC