As enterprises drive new technology innovations to fuel a customer-obsessed service delivery model, many legacy technologies are proving too rigid in their configurations. New business technology (BT) agenda efforts demand more-malleable technology elements upon which infrastructure and operations (I&O) professionals will build new applications and hybrid cloud flexibility. Composable infrastructure systems (CIS) are an emerging class of hardware that provides this flexibility. This report examines CIS concepts now pushing infrastructure in this direction. Software is the key to flexibility, but that software needs the right hardware to be complete.