Software, in its general sense, is a set of instructions or programs that instruct a computer to do specific tasks. Software is a generic term used to describe computer programs.
The hardware is the physical part of an IT system, consisting of the set of electrical, electronic and mechanical components that together can receive, process, store and reproduce information, in various forms of electrical, acoustic or optical signals.
A gadget (or a gadget object), borrowed from English, is a small technological object such as a device or apparatus, which performs a certain function, usually being a novelty.
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