Utility software

In computing, a "utility" is a program or module which is used to give a general-purpose result, for many different uses. A utility is intended for a wide range of users, rather than an "app" (application program) which might be intended to serve a specific purpose for specific users.
For example, a utility program may handle computer files or guard against computer viruses.
Definition.
Utility is a system software that corresponds towards analyzing, configuring and optimizing the computer.
Common examples of utility programs.
The word "utility" has been used to mean a "general-purpose computing tool" for many decades, since at least 1960.