book_menu in core/modules/book/book.module
Implements hook_menu().
contact_menu in core/modules/contact/contact.module
Implements hook_menu().
hook_menu in core/modules/system/system.api.php
Define menu items and page callbacks.
node_access_test_menu in core/modules/node/tests/node_access_test/node_access_test.module
Implements hook_menu().
search_menu in core/modules/search/search.module
Implements hook_menu().
user_form_test_menu in core/modules/user/tests/user_form_test/user_form_test.module
Implements hook_menu().
_menu_link_build in core/includes/menu.inc
Builds a link from a router item.