"Ask Bill why the string in [MS-DOS] function 9 is terminated by a
dollar sign. Ask him, because he can't answer. Only I know that."

• Dr. Gary Kildall.

https://httpstatusdogs.com/418-im-a-teapot

418 I'm a teapot - HTTP Status Dogs

HTTP Status Dogs. Hypertext Transfer Protocol Response status codes. And dogs.

^{HTTP Status Dogs}