maybe not underneath the control over a central computer, like in a manufacturing process or experiment.
maybe not attached to a computer or computer network.
Of a method, currently maybe not connected (usually electrically) to a more substantial community. Including, an electric plant that will be maybe not connected to the grid, or some type of computer that is perhaps not attached to the Web or to virtually any communications service.
Happening inside real world (the real world) in the place of on the web.