GUI (graphical user interface)
Operating system is interface between computer user and computer hardware.
Operating systems software manages the hardware on your computer, and provides an interface between the user- or application software, and the computer hardware.
Operating systems are software written to provide a way to manage system resources and to provide a interface for the user to interact with and operate the computer.
The Mac's operating system, like most operating systems, provides a means by which software can utilise the computer's hardware and it also presents the user with a graphical interface to facilitate operating the computer.
Windows XP and Windows 7 are examples of Operating Systems.
The functions of an operating system include booting the computer and performing basic tasks. The operating system manages the keyboard and mouse. It provides a graphical user interface.
hardware control is a operating system. OS is used to control the elctronic devices(hardware) via user. because user can't control hardware directly so, OS is used to interface computer & user
An operating system (or OS) is the piece of software that allows your computer's hardware to have a software interface. Examples of operating systems include Microsoft Windows 7, Apple OS X Lion, and even Android, Linux, and iOS. Without the operating system, a computer would boot to bios and be stuck there for all eternity.
Interface
SCSI stands for Small Computer System Interface. It is a set of standards used by computer engineers to physically connect and transfer data between computers and other devices.
Answering "Contributions computer operating systems have made to human Computer Interaction?"
The operating system (OS) controls the hardware. A successful computer system will have hardware and an operating system. Application software is not required. All operating systems have a low level, or machine language to run the operation system and control all hardware.