Which of the following is not considered a major operating system in business?

The Borland System Platform is not considered a major operating system in business primarily because it is not widely used or recognized in contemporary business environments. Unlike Windows, macOS, and Linux, which dominate the operating system landscape in both personal and enterprise use, the Borland System Platform has limited market presence and support.

Windows is prevalent in business settings due to its compatibility with a vast array of software applications and user familiarity. macOS, while primarily associated with creative industries, also holds a significant share in businesses that prioritize design and multimedia work. Linux is lauded for its flexibility, security, and open-source nature, making it popular for servers and enterprise applications.

In contrast, the Borland System Platform lacks the widespread adoption and support that characterize the major operating systems used in business today, which is why it stands out as the least significant option in this context.