405 Not Allowed -

The clerk pointed to a small plaque on the wall—the . It listed the only "verbs" the building accepted: GET, HEAD, OPTIONS .

"I’d like to this letter into the library's collection," Eli said, sliding a sealed envelope toward the slot. 405 Not Allowed

In the bustling city of Silicon Circuit, every citizen is a and every building is a Server . The clerk pointed to a small plaque on the wall—the

Eli sighed, realizing his mistake. He had the right address, but he was trying to use an "enter" key on a door that only had a handle to "exit." He tucked his letter away and set off for the correct endpoint. " Eli said