Linux

An operating system, abbreviated OS, is a product, software type,  that is part of a system, equipment or computerized equipment, which deals with management and coordination of its activities. The computerized system may be a computer, a workstation, a server, a PC, a notebook, a smartphone, a road navigation device or another system with "intelligence" of its own. The operating system plays the role of host for all applications running on the equipment (hardware).

Hardware:  where the people in your company's software section will tell you the problem is.  Software:  where the people in your company's hardware section will tell you the problem is.–Dave Barry, Claw Your Way to the Top