Twentyyearsago,itwascommonforasingleservertoprovideservicesforhundredsofusers.Asystemadministratorwasoftenresponsibleforasfewas10servers.Mostpeopleusedonlyonecomputer.In2015,itiscommonforanormal,everydaypersontoownandutilizemorethanfivehighlyadvancedandcapablecomputers.Thinka