An interface is what the user uses on an operating system to make the computer do tasks, like writing a document, or loading a web page. There are two types of interfaces, a command line interface (CLI for short), or a graphical user interface (GUI for short).
https://simple.wikipedia.org/wiki/Interface
Microsoft Windows has seen nine major versions since its first release in 1985. Over 29 years later, Windows looks very different but somehow familiar with elements that have survived the test of time, increases in computing power and – most recently – a shift from the keyboard and mouse to the touchscreen.
https://www.theguardian.com/technology/2014/oct/02/from-windows-1-to-windows-10-29-years-of-windows-evolution
The first commercially available GUI, called PARC, was developed by Xerox. It was used by the Xerox 8010 Information System, which was released in 1981. After Steve Jobs saw the interface during a tour at Xerox, he had his team at Apple develop an operating system with a similar design. Apple's GUI-based OS was included with the Macintosh, which was released in 1984. Microsoft released their first GUI-based OS, Windows 1.0, in 1985.
https://techterms.com/definition/gui
The enterprise twin of ME, Windows 2000 was released in February 2000 and was based on Microsoft’s business-orientated system Windows NT and later became the basis for Windows XP. Microsoft’s automatic updating played an important role in Windows 2000 and became the first Windows to support hibernation.
https://www.theguardian.com/technology/2014/oct/02/from-windows-1-to-windows-10-29-years-of-windows-evolution
See Graphical user interface. Graphical user interfaces are instead made of not only text, but also images. The first computer to do this was the Apple Lisa (1983). The following operating systems can use graphical user interfaces: Microsoft Windows.
https://simple.wikipedia.org/wiki/Interface
It is a user interface that includes graphical elements, such as windows, icons and buttons. The term was created in the 1970s to distinguish graphical interfaces from text-based ones, such as command line interfaces. However, today nearly all digital interfaces are GUIs.
https://techterms.com/definition/gui
Anyone can still use a command line interface on any computer very easily. 1  Interfaces are not only for the end user (average computer user), everybody uses interfaces! 2  Computers still could do good graphics at the time. 3  Linux is not an operating system, but a kernel (the core of an operating system).
https://simple.wikipedia.org/wiki/Interface
Apple used it in their first Macintosh computers. Later, Microsoft used many of the same ideas in their first version of the Windows operating system for IBM-compatible PCs. When creating an application, many object-oriented tools exist that facilitate writing a graphical user interface.
http://searchwindevelopment.techtarget.com/definition/GUI
This is where it all started for Windows. The original Windows 1 was released in November 1985 and was Microsoft’s first true attempt at a graphical user interface in 16-bit. Development was spearheaded by Microsoft founder Bill Gates and ran on top of MS-DOS, which relied on command-line input.
https://www.theguardian.com/technology/2014/oct/02/from-windows-1-to-windows-10-29-years-of-windows-evolution
Today's major operating systems provide a graphical user interface. Applications typically use the elements of the GUI that come with the operating system and add their own graphical user interface elements and ideas. A GUI sometimes uses one or more metaphors for objects familiar in real life, such as the desktop, the view through a window, or the physical layout in a building.
http://searchwindevelopment.techtarget.com/definition/GUI
which operating system was the first to use a graphical user interface?
Windows 1 operating system was the first to use a graphical user interface.