▁Officer ' s ▁Qu arters , ▁it ▁was ▁renov ated ▁in ▁ 1 9 8 7 ▁and ▁now ▁houses ▁the ▁Depart ments ▁of ▁English ▁and ▁Social ▁Sciences . ▁Old ▁Cad et ▁Library : ▁Comple ted ▁in ▁ 1 9 6 4 ▁and ▁attached ▁to ▁Bart lett ▁Hall , ▁it ▁served ▁the ▁Corps ▁for ▁over ▁ 4 0 ▁years ▁until ▁the ▁opening ▁of ▁Jefferson ▁Hall ▁in ▁ 2 0 0 8 . ▁Mah an ▁Hall : ▁Comple ted ▁in ▁ 1 9 7 4 , ▁it ▁is ▁named ▁after ▁US MA ▁al umn us ▁Dennis ▁Hart ▁Mah an . ▁▁ ▁Mah an ▁Hall ▁is ▁home ▁to ▁the ▁a cademy ' s ▁Department ▁of ▁Civil ▁& ▁Mechan ical ▁Engineering ▁and ▁Department ▁of ▁Systems ▁Engineering . ▁Th ayer ▁Hall : ▁Bu ilt ▁in ▁ 1 9 1 1 ▁as ▁a ▁r iding ▁hall ▁where ▁the ▁cad ets ▁were ▁taught ▁hors em ans hip , ▁in ▁ 1 9 5 8 ▁it ▁was ▁converted ▁into ▁an ▁academic ▁hall ▁containing ▁over ▁ 1 0 0 ▁class rooms . ▁The ▁cad et ▁book store ▁is ▁hous ed ▁on ▁the ▁fourth ▁floor ▁and ▁there ▁is ▁a ▁large ▁lecture ▁hall , ▁Robinson ▁Aud itor ium ▁in ▁the ▁south ▁end ▁of ▁the ▁building . ▁The ▁first ▁two ▁flo ors ▁of ▁Th ayer ▁Hall ▁are ▁home ▁to ▁the ▁Depart ments ▁of ▁History , ▁Mathemat ics , ▁Be havior al ▁Sciences ▁and ▁Le ad ership ▁( BS & L ), ▁and ▁Elect rical ▁Engineering ▁and ▁Computer ▁Science ▁( EE CS ). ▁Washington ▁Hall :