Cloud Computing: Background, Status of Adoption by Federal Agencies, and Congressional Action [Updated March 25, 2020] [open pdf - 1MB]
From the Summary: "Cloud computing is a new name for an old concept: the delivery of computing services from a remote location, analogous to the way electricity, water, and other utilities are provided to most customers. Cloud computing services are delivered through a network, usually the internet. Utilities are also delivered through networks, whether the electric grid, water delivery systems, or other distribution infrastructure. In some ways, cloud computing is reminiscent of computing before the advent of the personal computer, where users shared the power of a central mainframe computer through video terminals or other devices. Cloud computing, however, is much more powerful and flexible, and information technology advances may permit the approach to become ubiquitous."
CRS Report for Congress, R46119
Congressional Research Service: https://crsreports.congress.gov/