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In computing, "utility" can refer to two main concepts:

utility software, which are programs that maintain and optimize a computer's performance, and utility computing, a cloud computing model where resources are provided as a metered service like a utility. Utility software includes system maintenance tools like disk cleanup and antivirus programs, while utility computing provides on-demand access to computing resources such as storage or processing power for a usage-based fee.

Utility software

Definition: Programs that help analyze, configure, optimize, and maintain a computer system. They support the operating system and computer infrastructure rather than performing end-user tasks directly, though some can be user-facing.

Purpose: To keep the computer running smoothly and efficiently.

Utility computing

Definition: A service provisioning model where a provider offers computing resources and infrastructure management on-demand, similar to how a power company provides electricity. Users pay for what they use instead of a flat rate.

Purpose: To provide flexible, scalable access to computing resources without the high upfront costs of purchasing hardware.