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The word software is also sometimes used in a more narrow sense, meaning application software only. At the lowest level, executable code consists of machine language instructions specific to an individual processor âtypically a central processing unit (CPU).
Quick Answer. Utility software is used to perform basic maintenance tasks on a computer. Examples include disk utilities like defragmenters, compressors and cleaners. There are also operating system utilities such as antivirus programs, registry cleaners and system restoration programs.