|The operating system is at such a low level in the stack that Drupal does not care much about it. Drupal runs successfully on any operating system that supports PHP.
John VanDyk and Matt Westgate, What Is Drupal?
Drupal can be used to build an Internet portal; a personal, departmental, or corporate web site; an e-commerce site; a resource directory; an online newspaper; an image gallery; and an intranet, to mention only a few. It can even be used to teach a distance-learning course.
Drupal originated as a bulletin board system developed by Dries Buytaert in the Netherlands, and became an Open Source project in 2001. When establishing his original Drop.org Website, Buytaert wanted to call the site “dorp” (“village” in Dutch), but made a typo when checking the domain name, and decided the altered form sounded better (Drupal is a transliteration of the Dutch “druppel” which means droplet).