system resource
physical or virtual component of limited availability within a computer system
shared resource
computer resource made available from one host to other hosts on a computer network
CPU time
amount of time for which a central processing unit (CPU) was used for processing instructions of a computer program or operating system, as opposed to, for example, waiting for input/output (I/O) operations or entering low-power (idle) mode
cloud computing
form of Internet-based computing, whereby shared resources, software and information are provided to computers and other devices