SaaS refers to

$($A$)$ supplying online access over networks to storage devices and storage area network technology.

managing combinations of applications, networks, systems, storage, and security as well as providing Web site and systems performance monitoring to subscribers over the Internet.

self$-$contained services that communicate with each other to create a working software application.

easy$-$to$-$use software tools for displaying Web pages.

hosting and managing access to software applications delivered over the Internet to clients on a subscription basis.