backdrop_deliver_page in core/includes/common.inc

Delivers a page callback result to the browser in the appropriate format.

hook_page_delivery_callback_alter in core/modules/system/system.api.php

Alters the delivery callback used to send the result of the page callback to the browser.

node_menu in core/modules/node/node.module

Implements hook_menu().

taxonomy_menu in core/modules/taxonomy/taxonomy.module

Implements hook_menu().

user_form_test_menu in core/modules/user/tests/user_form_test/user_form_test.module

Implements hook_menu().

user_menu_alter in core/modules/user/user.module

Implements hook_menu_alter().