This OS was created by a developer named Torvalds. Linux Mac Unix Windows

Linux.

Explanation:

Linus Torvalds is a Finnish computer programmer, creator of the Linux operating system kernel in 1991. Torvalds began developing his project through research done in a particular way during his spare time, using his own computers, tools and spare parts, and taking the Minix operating system as a starting point, seeking to create his own operating system to use on his own personal computers. Finally, as a result of this development, Torvalds created the largest and best-known open software operating system today.

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