diff --git includes/ajax.inc includes/ajax.inc
index 8ad3bc3..221fca1 100644
--- includes/ajax.inc
+++ includes/ajax.inc
@@ -604,8 +604,8 @@ function ajax_pre_render_element($element) {
 
   // Attach JavaScript settings to the element.
   if (isset($element['#ajax']['event'])) {
-    $element['#attached']['library'][] = array('system', 'form');
-    $element['#attached']['js']['misc/ajax.js'] = array('group' => JS_LIBRARY, 'weight' => 2);
+    $element['#attached']['library'][] = array('system', 'jquery.form');
+    $element['#attached']['library'][] = array('system', 'drupal.ajax');
 
     $settings = $element['#ajax'];
 
@@ -667,10 +667,6 @@ function ajax_pre_render_element($element) {
       $settings['progress']['url'] = url($settings['progress']['path']);
       unset($settings['progress']['path']);
     }
-    // Add progress.js if we're doing a bar display.
-    if ($settings['progress']['type'] == 'bar') {
-      $element['#attached']['js']['misc/progress.js'] = array('cache' => FALSE);
-    }
 
     $element['#attached']['js'][] = array(
       'type' => 'setting',
diff --git includes/batch.inc includes/batch.inc
index 0f30bc4..3f31fc5 100644
--- includes/batch.inc
+++ includes/batch.inc
@@ -139,8 +139,7 @@ function _batch_progress_page_js() {
     ),
   );
   drupal_add_js($js_setting, 'setting');
-  drupal_add_js('misc/progress.js', array('cache' => FALSE));
-  drupal_add_js('misc/batch.js', array('cache' => FALSE));
+  drupal_add_library('system', 'drupal.batch');
 
   return '<div id="progress"></div>';
 }
diff --git includes/common.inc includes/common.inc
index 651eb6a..71fc971 100644
--- includes/common.inc
+++ includes/common.inc
@@ -3933,7 +3933,7 @@ function drupal_add_js($data = NULL, $options = NULL) {
       );
       // Register all required libraries.
       drupal_add_library('system', 'jquery', TRUE);
-      drupal_add_library('system', 'once', TRUE);
+      drupal_add_library('system', 'jquery.once', TRUE);
     }
 
     switch ($options['type']) {
@@ -4410,7 +4410,7 @@ function drupal_process_attached($elements, $group = JS_DEFAULT, $dependency_che
  * @see form_example_states_form()
  */
 function drupal_process_states(&$elements) {
-  $elements['#attached']['js']['misc/states.js'] = array('group' => JS_LIBRARY, 'weight' => 1);
+  $elements['#attached']['library'][] = array('system', 'drupal.states');
   $elements['#attached']['js'][] = array(
     'type' => 'setting',
     'data' => array('states' => array('#' . $elements['#id'] => $elements['#states'])),
@@ -4636,7 +4636,7 @@ function drupal_add_tabledrag($table_id, $action, $relationship, $group, $subgro
     // Add the table drag JavaScript to the page before the module JavaScript
     // to ensure that table drag behaviors are registered before any module
     // uses it.
-    drupal_add_js('misc/jquery.cookie.js', array('weight' => -2));
+    drupal_add_library('system', 'jquery.cookie');
     drupal_add_js('misc/tabledrag.js', array('weight' => -1));
     $js_added = TRUE;
   }
diff --git includes/form.inc includes/form.inc
index efbbe5a..e3c9e92 100644
--- includes/form.inc
+++ includes/form.inc
@@ -3319,7 +3319,7 @@ function form_process_fieldset(&$element, &$form_state) {
   }
 
   // Contains form element summary functionalities.
-  $element['#attached']['js']['misc/form.js'] = array('group' => JS_LIBRARY, 'weight' => 1);
+  $element['#attached']['library'][] = array('system', 'drupal.form');
 
   // The .form-wrapper class is required for #states to treat fieldsets like
   // containers.
@@ -3329,7 +3329,7 @@ function form_process_fieldset(&$element, &$form_state) {
 
   // Collapsible fieldsets
   if (!empty($element['#collapsible'])) {
-    $element['#attached']['js'][] = 'misc/collapse.js';
+    $element['#attached']['library'][] = array('system', 'drupal.collapse');
     $element['#attributes']['class'][] = 'collapsible';
     if (!empty($element['#collapsed'])) {
       $element['#attributes']['class'][] = 'collapsed';
@@ -3445,7 +3445,7 @@ function form_process_vertical_tabs($element, &$form_state) {
 function theme_vertical_tabs($variables) {
   $element = $variables['element'];
   // Add required JavaScript and Stylesheet.
-  drupal_add_library('system', 'vertical-tabs');
+  drupal_add_library('system', 'drupal.vertical-tabs');
 
   $output = '<h2 class="element-invisible">' . t('Vertical Tabs') . '</h2>';
   $output .= '<div class="vertical-tabs-panes">' . $element['#children'] . '</div>';
@@ -3554,7 +3554,7 @@ function theme_textfield($variables) {
 
   $extra = '';
   if ($element['#autocomplete_path'] && drupal_valid_path($element['#autocomplete_path'])) {
-    drupal_add_js('misc/autocomplete.js');
+    drupal_add_library('system', 'drupal.autocomplete');
     $element['#attributes']['class'][] = 'form-autocomplete';
 
     $attributes = array();
@@ -3616,7 +3616,7 @@ function theme_textarea($variables) {
 
   // Add resizable behavior.
   if (!empty($element['#resizable'])) {
-    drupal_add_js('misc/textarea.js');
+    drupal_add_library('system', 'drupal.textarea');
     $wrapper_attributes['class'][] = 'resizable';
   }
 
diff --git modules/comment/comment.module modules/comment/comment.module
index fe6f9b5..e3bf203 100644
--- modules/comment/comment.module
+++ modules/comment/comment.module
@@ -1852,7 +1852,7 @@ function comment_form($form, &$form_state, $comment) {
   $is_admin = (!empty($comment->cid) && user_access('administer comments'));
 
   if (!$user->uid && $anonymous_contact != COMMENT_ANONYMOUS_MAYNOT_CONTACT) {
-    $form['#attached']['library'][] = array('system', 'cookie');
+    $form['#attached']['library'][] = array('system', 'jquery.cookie');
     $form['#attributes']['class'][] = 'user-info-from-cookie';
   }
 
diff --git modules/contact/contact.pages.inc modules/contact/contact.pages.inc
index 0cf6c12..456bf2b 100644
--- modules/contact/contact.pages.inc
+++ modules/contact/contact.pages.inc
@@ -57,7 +57,7 @@ function contact_site_form($form, &$form_state) {
   }
 
   if (!$user->uid) {
-    $form['#attached']['library'][] = array('system', 'cookie');
+    $form['#attached']['library'][] = array('system', 'jquery.cookie');
     $form['#attributes']['class'][] = 'user-info-from-cookie';
   }
 
@@ -187,7 +187,7 @@ function contact_personal_form($form, &$form_state, $recipient) {
   drupal_set_title(t('Contact @username', array('@username' => format_username($recipient))), PASS_THROUGH);
 
   if (!$user->uid) {
-    $form['#attached']['library'][] = array('system', 'cookie');
+    $form['#attached']['library'][] = array('system', 'jquery.cookie');
     $form['#attributes']['class'][] = 'user-info-from-cookie';
   }
 
diff --git modules/openid/openid.module modules/openid/openid.module
index c89c264..24ec832 100644
--- modules/openid/openid.module
+++ modules/openid/openid.module
@@ -137,7 +137,7 @@ function openid_form_user_login_alter(&$form, &$form_state) {
 function _openid_user_login_form_alter(&$form, &$form_state) {
   $form['#attached']['css'][] = drupal_get_path('module', 'openid') . '/openid.css';
   $form['#attached']['js'][] = drupal_get_path('module', 'openid') . '/openid.js';
-  $form['#attached']['library'][] = array('system', 'cookie');
+  $form['#attached']['library'][] = array('system', 'jquery.cookie');
   if (!empty($form_state['input']['openid_identifier'])) {
     $form['name']['#required'] = FALSE;
     $form['pass']['#required'] = FALSE;
diff --git modules/overlay/overlay.module modules/overlay/overlay.module
index 57cf9b7..052a141 100644
--- modules/overlay/overlay.module
+++ modules/overlay/overlay.module
@@ -206,7 +206,7 @@ function overlay_library() {
     ),
     'dependencies' => array(
       array('system', 'ui'),
-      array('system', 'jquery-bbq'),
+      array('system', 'jquery.bbq'),
     ),
   );
   // Overlay child.
diff --git modules/system/system.module modules/system/system.module
index 0db5752..6c6e54e 100644
--- modules/system/system.module
+++ modules/system/system.module
@@ -1076,6 +1076,89 @@ function _system_batch_theme() {
  * Implements hook_library().
  */
 function system_library() {
+  // Drupal's AJAX framework.
+  $libraries['drupal.ajax'] = array(
+    'title' => 'Drupal AJAX',
+    'website' => 'http://api.drupal.org/api/drupal/includes--ajax.inc/group/ajax/7',
+    'version' => VERSION,
+    'js' => array(
+      'misc/ajax.js' => array('group' => JS_LIBRARY, 'weight' => 2),
+    ),
+    'dependencies' => array(
+      array('system', 'drupal.progress'),
+    ),
+  );
+
+  // Drupal's batch API.
+  $libraries['drupal.batch'] = array(
+    'title' => 'Drupal batch API',
+    'version' => VERSION,
+    'js' => array(
+      'misc/batch.js' => array('cache' => FALSE),
+    ),
+    'dependencies' => array(
+      array('system', 'drupal.progress'),
+    ),
+  );
+
+  // Drupal's progress indicator.
+  $libraries['drupal.progress'] = array(
+    'title' => 'Drupal progress indicator',
+    'version' => VERSION,
+    'js' => array(
+      'misc/progress.js' => array('cache' => FALSE),
+    ),
+  );
+
+  // Drupal's form library.
+  $libraries['drupal.form'] = array(
+    'title' => 'Drupal form library',
+    'version' => VERSION,
+    'js' => array(
+      'misc/form.js' => array('group' => JS_LIBRARY, 'weight' => 1),
+    ),
+  );
+
+  // Drupal's states library.
+  $libraries['drupal.states'] = array(
+    'title' => 'Drupal states',
+    'version' => VERSION,
+    'js' => array(
+      'misc/states.js' => array('group' => JS_LIBRARY, 'weight' => 1),
+    ),
+  );
+
+  // Drupal's collapsible fieldset.
+  $libraries['drupal.collapse'] = array(
+    'title' => 'Drupal collapsible fieldset',
+    'version' => VERSION,
+    'js' => array(
+      'misc/collapse.js' => array(),
+    ),
+    'dependencies' => array(
+      // collapse.js relies on drupalGetSummary in form.js
+      array('system', 'drupal.form'),
+    ),
+  );
+
+  // Drupal's resizable textarea.
+  $libraries['drupal.textarea'] = array(
+    'title' => 'Drupal resizable textarea',
+    'version' => VERSION,
+    'js' => array(
+      'misc/textarea.js' => array(),
+    ),
+  );
+
+  // Drupal's autocomplete widget.
+  $libraries['drupal.autocomplete'] = array(
+    'title' => 'Drupal autocomplete',
+    'version' => VERSION,
+    'js' => array(
+      'misc/autocomplete.js' => array(),
+    ),
+  );
+
   // jQuery.
   $libraries['jquery'] = array(
     'title' => 'jQuery',
@@ -1087,7 +1170,7 @@ function system_library() {
   );
 
   // jQuery Once.
-  $libraries['once'] = array(
+  $libraries['jquery.once'] = array(
     'title' => 'jQuery Once',
     'website' => 'http://plugins.jquery.com/project/once',
     'version' => '1.2',
@@ -1097,7 +1180,7 @@ function system_library() {
   );
 
   // jQuery Form Plugin.
-  $libraries['form'] = array(
+  $libraries['jquery.form'] = array(
     'title' => 'jQuery Form Plugin',
     'website' => 'http://malsup.com/jquery/form/',
     'version' => '2.49',
@@ -1107,7 +1190,7 @@ function system_library() {
   );
 
   // jQuery BBQ plugin.
-  $libraries['jquery-bbq'] = array(
+  $libraries['jquery.bbq'] = array(
     'title' => 'jQuery BBQ',
     'website' => 'http://benalman.com/projects/jquery-bbq-plugin/',
     'version' => '1.2.1',
@@ -1117,7 +1200,7 @@ function system_library() {
   );
 
   // Vertical Tabs.
-  $libraries['vertical-tabs'] = array(
+  $libraries['drupal.vertical-tabs'] = array(
     'title' => 'Vertical Tabs',
     'website' => 'http://drupal.org/node/323112',
     'version' => '1.0',
@@ -1127,6 +1210,10 @@ function system_library() {
     'css' => array(
       'misc/vertical-tabs.css' => array(),
     ),
+    'dependencies' => array(
+      // Vertical tabs relies on drupalGetSummary in form.js
+      array('system', 'drupal.form'),
+    ),
   );
 
   // Farbtastic.
@@ -1143,7 +1230,7 @@ function system_library() {
   );
 
   // Cookie.
-  $libraries['cookie'] = array(
+  $libraries['jquery.cookie'] = array(
     'title' => 'Cookie',
     'website' => 'http://plugins.jquery.com/project/cookie',
     'version' => '1.0',
@@ -1533,6 +1620,15 @@ function system_library() {
     ),
   );
 
+  // These library names are deprecated. Earlier versions of Drupal 7 didn't
+  // consistently namespace their libraries, so these names are included for
+  // backwards compatibility with those versions.
+  $libraries['once'] = $libraries['jquery.once'];
+  $libraries['form'] = $libraries['jquery.form'];
+  $libraries['jquery-bbq'] = $libraries['jquery.bbq'];
+  $libraries['vertical-tabs'] = $libraries['drupal.vertical-tabs'];
+  $libraries['cookie'] = $libraries['jquery.cookie'];
+
   return $libraries;
 }
 
diff --git modules/toolbar/toolbar.module modules/toolbar/toolbar.module
index 930996e..6ecc9ab 100644
--- modules/toolbar/toolbar.module
+++ modules/toolbar/toolbar.module
@@ -188,7 +188,6 @@ function toolbar_view() {
     '#attached'=> array(
       'js' => array(
         $module_path . '/toolbar.js',
-        array('data' => 'misc/jquery.cookie.js', 'group' => JS_LIBRARY, 'weight' => 2),
         array(
           'data' => array('tableHeaderOffset' => 'Drupal.toolbar.height'),
           'type' => 'setting'
@@ -197,6 +196,7 @@ function toolbar_view() {
       'css' => array(
         $module_path . '/toolbar.css',
       ),
+      'library' => array(array('system', 'jquery.cookie')),
     ),
   );
 
diff --git modules/user/user.module modules/user/user.module
index cb29b70..d410770 100644
--- modules/user/user.module
+++ modules/user/user.module
@@ -3540,7 +3540,7 @@ function user_register_form($form, &$form_state) {
   $form['#user'] = drupal_anonymous_user();
   $form['#user_category'] = 'register';
 
-  $form['#attached']['library'][] = array('system', 'cookie');
+  $form['#attached']['library'][] = array('system', 'jquery.cookie');
   $form['#attributes']['class'][] = 'user-info-from-cookie';
 
   // Start with the default user account fields.