Open Watcom is a compiler for DOS. Every search engine will try ten ways to politely tell you that you obviously meant Wacom tablets, you illiterate goblin, and then shrug and direct you to the project's own single-page FAQ.

Asking questions about DOS itself is even worse. Say you want the scan codes for arrow keys. Then say it a hundred more times, with increasing specificity and occasional vulgarity, because you are getting nothing but "how to use a terminal window in Windows." Or at best, Ralph Brown's big fat interrupt list, rearranged into the most Geocities-ass jumble of pages, where you can easily look up what any specific hex code does, once you already know which code to look for.