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KEY TERMS AND DEFINITIONS

IaaS: Infrastructure as a Service is a provision
model in which the customer outsources the equip-
ment used to support operations, including storage,
hardware, servers and networking components.
Infrastructure Costs: Hardware, networking,
and physical location costs
PaaS: Platform as a Service (PaaS) includes
the delivery of operating systems and associated
desktop services over the Internet without down-
load or installation
SaaS: Software as a Service is a software
distribution and usage model that is available via
a network to the customers.
SLA: Service Level Agreements (SLA) is a
contractual service commitment.
Software Development Costs: Development
costs that are affected by the process, the product,
the platform the personnel
TCO: Total Cost of Ownership, direct and
indirect costs and benefits related to the purchase
of any IT component

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