diff --git a/book/internals.rst b/book/internals.rst
index dd67e44e508..58f57d31dc2 100644
--- a/book/internals.rst
+++ b/book/internals.rst
@@ -23,7 +23,7 @@ on top of the previous one.
 
     Autoloading is not managed by the framework directly; it's done by using
     Composer's autoloader (``vendor/autoload.php``), which is included in
-    the ``src/autoload.php`` file.
+    the ``app/autoload.php`` file.
 
 ``HttpFoundation`` Component
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/book/page_creation.rst b/book/page_creation.rst
index a2f74db1f9d..0f3d639a888 100644
--- a/book/page_creation.rst
+++ b/book/page_creation.rst
@@ -506,13 +506,13 @@ You'll learn more about each of these directories in later chapters.
 
 .. sidebar:: Autoloading
 
-    When Symfony is loading, a special file - ``app/autoload.php`` - is included.
-    This file is responsible for configuring the autoloader, which will autoload
-    your application files from the ``src/`` directory and third-party libraries
-    from the ``vendor/`` directory.
+    When Symfony is loading, a special file - ``vendor/autoload.php`` - is 
+    included. This file is created by Composer and will autoload all 
+    application files living in the `src/` folder as well as all 
+    third-party libraries mentioned in the ``composer.json`` file.
 
     Because of the autoloader, you never need to worry about using ``include``
-    or ``require`` statements. Instead, Symfony2 uses the namespace of a class
+    or ``require`` statements. Instead, Composer uses the namespace of a class
     to determine its location and automatically includes the file on your
     behalf the instant you need a class.
 
@@ -527,11 +527,6 @@ You'll learn more about each of these directories in later chapters.
         Path:
             src/Acme/HelloBundle/Controller/HelloController.php
 
-    Typically, the only time you'll need to worry about the ``app/autoload.php``
-    file is when you're including a new third-party library in the ``vendor/``
-    directory. For more information on autoloading, see
-    :doc:`How to autoload Classes</components/class_loader>`.
-
 The Source (``src``) Directory
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -603,7 +598,6 @@ are used by your application (including the core Symfony bundles).
 
    A bundle can live *anywhere* as long as it can be autoloaded (via the
    autoloader configured at ``app/autoload.php``).
-
 Creating a Bundle
 ~~~~~~~~~~~~~~~~~
 
diff --git a/cookbook/symfony1.rst b/cookbook/symfony1.rst
index 14ec51a0fca..4f35cd3f068 100644
--- a/cookbook/symfony1.rst
+++ b/cookbook/symfony1.rst
@@ -114,7 +114,7 @@ That array told symfony1 exactly which file contained each class. In the
 production environment, this caused you to need to clear the cache when classes
 were added or moved.
 
-In Symfony2, a new class - ``UniversalClassLoader`` - handles this process.
+In Symfony2, a tool named `Composer`_ handles this process.
 The idea behind the autoloader is simple: the name of your class (including
 the namespace) must match up with the path to the file containing that class.
 Take the ``FrameworkExtraBundle`` from the Symfony2 Standard Edition as an
@@ -136,18 +136,7 @@ As you can see, the location of the file follows the namespace of the class.
 Specifically, the namespace, ``Sensio\Bundle\FrameworkExtraBundle``, spells out
 the directory that the file should live in
 (``vendor/sensio/framework-extra-bundle/Sensio/Bundle/FrameworkExtraBundle/``).
-This is because, in the ``app/autoload.php`` file, you'll configure Symfony to
-look for the ``Sensio`` namespace in the ``vendor/sensio`` directory:
-
-.. code-block:: php
-
-    // app/autoload.php
-
-    // ...
-    $loader->registerNamespaces(array(
-        ...,
-        'Sensio'           => __DIR__.'/../vendor/sensio/framework-extra-bundle',
-    ));
+Composer can then look for the file at this specific place and load it very fast.
 
 If the file did *not* live at this exact location, you'd receive a
 ``Class "Sensio\Bundle\FrameworkExtraBundle\SensioFrameworkExtraBundle" does not exist.``
@@ -160,24 +149,24 @@ contains a different class). In order for a class to be autoloaded, you
 As mentioned before, for the autoloader to work, it needs to know that the
 ``Sensio`` namespace lives in the ``vendor/bundles`` directory and that, for
 example, the ``Doctrine`` namespace lives in the ``vendor/doctrine/orm/lib/``
-directory. This mapping is entirely controlled by you via the
-``app/autoload.php`` file.
+directory. This mapping is entirely controlled by Composer. Each 
+third-party library you load through composer has their settings defined
+and Composer takes care of everything for you.
+
+For this to work, all third-party libraries used by your project must be 
+defined in the `composer.json` file. 
 
 If you look at the ``HelloController`` from the Symfony2 Standard Edition you
 can see that it lives in the ``Acme\DemoBundle\Controller`` namespace. Yet, the
-``Acme`` namespace is not defined in the ``app/autoload.php``. By default you
-do not need to explicitly configure the location of bundles that live in the
-``src/`` directory. The ``UniversalClassLoader`` is configured to fallback to
-the ``src/`` directory using its ``registerNamespaceFallbacks`` method:
+``AcmeDemoBundle`` is not defined in your `composer.json` file. Nonetheless are
+the files autoloaded. This is because you can tell composer to autoload files 
+from specific directories without defining a dependency:
 
-.. code-block:: php
-
-    // app/autoload.php
+.. code-block:: yaml
 
-    // ...
-    $loader->registerNamespaceFallbacks(array(
-        __DIR__.'/../src',
-    ));
+    "autoload": {
+        "psr-0": { "": "src/" }
+    }
 
 Using the Console
 -----------------
@@ -312,3 +301,4 @@ primarily to configure objects that you can use. For more information, see
 the chapter titled ":doc:`/book/service_container`".
 
 .. _`Symfony2 Standard`: https://github.com/symfony/symfony-standard
+.. _`Composer`: http://getcomposer.org
\ No newline at end of file