noun
: software that controls the operation of a computer and directs the processing of the user's programs (as by assigning storage space in memory and controlling input and output functions)
noun
: software that controls the operation of a computer and directs the processing of the user's programs (as by assigning storage space in memory and controlling input and output functions)
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012