The correct answer is B. Mac OS.
Mac OS is a Unix operating system developed and marketed by Apple Inc. since 1984. It is the primary operating system for Apple’s Mac computers. Within the market of desktop, laptop and home computers, and by web usage, it is the second most widely used desktop OS, after Microsoft Windows.
Mac OS is a Unix operating system, which means that it is based on the Unix kernel. Unix is a multitasking, multiuser operating system that was originally developed at AT&T’s Bell Labs research center in the 1960s. Unix was designed to be a reliable and efficient operating system for running large computer systems.
Mac OS was first released in 1984, and it was originally based on the Unix operating system developed by NeXT, Inc. NeXT was a computer company founded by Steve Jobs after he left Apple in 1985. Apple acquired NeXT in 1997, and Mac OS has been based on NeXT’s Unix operating system ever since.
Mac OS has evolved over the years, and it is now a powerful and user-friendly operating system. It includes a number of features that make it a popular choice for users, including a graphical user interface, a variety of applications, and a wide range of hardware support.
Here is a brief explanation of each option:
- MS-DOS: MS-DOS is a discontinued operating system that was developed by Microsoft for IBM personal computers. It was the first widely used operating system for IBM PCs, and it was used on millions of computers in the 1980s and 1990s. MS-DOS was a command-line operating system, which means that users had to type commands to interact with the computer.
- Unix: Unix is a multitasking, multiuser operating system that was originally developed at AT&T’s Bell Labs research center in the 1960s. Unix was designed to be a reliable and efficient operating system for running large computer systems. Unix is still widely used today, particularly on servers and supercomputers.
- Gnome: Gnome is a desktop environment for Unix-like operating systems. It is a free and open-source software project that is developed by the Gnome Foundation. Gnome includes a number of applications, such as a web browser, an email client, and a word processor.
- None of these: None of the other options are early desktop operating systems that included an integrated graphic user interface with point-and-click features.