The correct answer is: A. Windows.
Microsoft Excel is a spreadsheet program developed by Microsoft for Windows, macOS, Android and iOS. It is a part of the Microsoft Office suite, and its primary function is to create and edit spreadsheets, which are documents that contain data arranged in cells. Excel also has a number of features that allow users to perform calculations, analyze data, and create charts and graphs.
Excel was first released in 1985 for the IBM PC. It was originally called Multiplan, but was renamed Excel when it was released for the Macintosh in 1987. Excel has been through many versions since its release, and the latest version is Excel 2021.
Excel is a very popular spreadsheet program, and it is used by millions of people around the world. It is used in a variety of industries, including business, finance, education, and government.
The other options are incorrect because:
- DOS is a discontinued operating system that was developed by Microsoft. It was first released in 1981, and it was the primary operating system for IBM PCs until the release of Windows in 1985.
- UNIX is a multitasking, multiuser computer operating system that was developed at AT&T’s Bell Labs research center. It was first released in 1970, and it is still in use today, primarily on servers and supercomputers.
- OS/2 is a discontinued operating system that was developed jointly by IBM and Microsoft. It was first released in 1987, and it was intended to be a replacement for DOS. However, it was not successful, and it was discontinued in 2001.