I&O is short for Infrastructure and Operations. This term is used widely by analysts such as Forrester & Gartner. I&O is usually grouped for IT Pros, incorporating things like server virtualization, data center consolidation, storage optimization, unified communications (for Infrastructure) and ITSM/ITIL process maturity, service catalogs, service rate setting/chargeback (for Operations). Legacy infrastructure and operations practices and traditional data center architectures are not sufficient to meet the demands of the digital business. Digital transformation requires IT agility and velocity that outstrips classical architectures and practices.