Minor content/messaging changes in advance of final review.

Change-Id: I0c1b9f85db253a56c1c8daf6239eb9fec44ed124
diff --git a/pdk/docs/about/index.jd b/pdk/docs/about/index.jd
index 2f98b65..43d2a8d 100644
--- a/pdk/docs/about/index.jd
+++ b/pdk/docs/about/index.jd
@@ -3,10 +3,10 @@
 doc.hidenav=true
 @jd:body
 <p>Android is an open-source software stack created for mobile phones and
-other devices.  The Android Open Source Project (AOSP) is tasked with the
-maintenance and further development of Android. Many device manufacturers have
-brought to market devices running Android, and they are readibly available
-around the world.</p>
+other devices.  The Android Open Source Project (AOSP), led by Google, is
+tasked with the maintenance and further development of Android. Many device
+manufacturers have brought to market devices running Android, and they are
+readibly available around the world.</p>
 <p>Our primary purpose is to build an excellent software platform for everyday
 users. A number of companies have committed many engineers to achieve this
 goal, and the result is a full production quality consumer product whose
diff --git a/pdk/docs/about/philosophy.jd b/pdk/docs/about/philosophy.jd
index eb3039e..1562e42 100644
--- a/pdk/docs/about/philosophy.jd
+++ b/pdk/docs/about/philosophy.jd
@@ -2,7 +2,7 @@
 doc.type=about
 doc.hidenav=true
 @jd:body
-<p>Android is an open-source software stack for mobile phones and similar
+<p>Android is an open-source software stack for mobile phones and other
 devices.</p>
 <h2>Origin and Goal</h2>
 <p>Android was originated by a group of companies known as the Open Handset
@@ -16,9 +16,8 @@
 ideas a reality. We wanted to make sure that there was no central point of
 failure, where one industry player could restrict or control the innovations
 of any other. The solution we chose was an open and open-source platform.</p>
-<p>But the ultimate goal, of course, is to improve the mobile experience for
-real users by facilitating innovation. Accordingly, the primary goal of the
-AOSP is to make sure Android is a success as an end user product.</p>
+<p>The goal of the Android Open Source Project is to create a successful
+real-world product that improves the mobile experience for end users.</p>
 <h2>Governance Philosophy</h2>
 <p>The companies that have invested in Android have done so on its merits,
 because we believe that an open platform is necessary. Android is
@@ -34,7 +33,7 @@
 Anyone can (and will!) use the Android source code for any purpose, and we
 welcome all such uses. However, in order to take part in the shared
 ecosystem of applications that we are building around Android, device builders
-can take advantage of the Compatibility Program.</p>
+must participate in the Compatibility Program.</p>
 <p>Though Android consists of multiple sub-projects, this is strictly a
 project-management technique. We view and manage Android as a single,
 holistic software product, not a "distribution", specification, or collection
diff --git a/pdk/docs/compatibility/index.jd b/pdk/docs/compatibility/index.jd
index a1c37ae..55be052 100644
--- a/pdk/docs/compatibility/index.jd
+++ b/pdk/docs/compatibility/index.jd
@@ -1,16 +1,20 @@
 page.title=Android Compatibility
 doc.type=compatibility
 @jd:body
-<p>Android is an open source product, and anyone can use the source code to build
-devices. The purpose of the Android compatibility program is to help Android
-device implementations remain compatible with apps.</p>
-<p>A device is considered compatible if existing and new third-party
-applications run correctly on it. Poor device implementations that change APIs
-or alter behaviors will break these apps and so are not compatible. The
-Android Compatibility Program provides information and tools that device
-implementers use to ensure that their devices are Android-compatible.</p>
-<p>The latest version of the Android source code and compatibility program is
-2.1, which roughly corresponded to the Eclair branch.</p>
+<p>Android's purpose is to establish an open platform for developers to build
+innovative mobile apps. Three key components work together to realize this
+platform.</p>
+<p>The Android Compatibility Program defines the technical details of Android
+platform and provides tools used by OEMs to ensure that developers’ apps run
+on a variety of devices. The Android SDK provides built-in tools that
+Developers use to clearly state the device features their apps require. And
+Android Market shows apps only to those devices that can properly run
+them.</p>
+<p>These pages describe the Android Compatibility Program and how to get
+access to compatibility information and tools. The latest version of the
+Android source code and compatibility program is 2.1, which roughly
+corresponded to the Eclair branch.</p>
+
 
 <h2>Why build compatible Android devices?</h2>
 <h3>Users want a customizable device.</h3>
@@ -38,7 +42,7 @@
 sure your device is compatible with Android. For more details about the
 Android compatibility program in general, see <a
 href="{@docRoot}compatibility/overview.html">the program overview</a>.</p>
-<p>Building a compatible device is a four-step process:</p>
+<p>Building a compatible device is a three-step process:</p>
 <ol>
   <li><b>Obtain the Android software source code</b><p>This is the
   <a href="{@docRoot}source/index.html">source code for the Android
@@ -55,6 +59,6 @@
 <p>Once you've built a compatible device, you may wish to include Android
 Market to provide your users access to the third-party app ecosystem.
 Unfortunately, for a variety of legal and business reasons, we aren't able to
-automatically license Android Market to any compatible device. To inquire
+automatically license Android Market to all compatible devices. To inquire
 about access about Android Market, you can <a
 href="{@docRoot}compatibility/contact-us.html">contact us</a></p>
diff --git a/pdk/docs/source/index.jd b/pdk/docs/source/index.jd
index 9dbd971..a9acbf4 100644
--- a/pdk/docs/source/index.jd
+++ b/pdk/docs/source/index.jd
@@ -26,7 +26,9 @@
 
 <h2>Contribute to the Code</h2>
 <p>Code is King. We'd love to review any changes you submit, so please check
-out the source, pick a bug or feature, and get coding.</p>
+out the source, pick a bug or feature, and get coding. Note that the smaller
+and more targetted your patch submissions, the easier it will be for us to
+review them.</p>
 <p>You can get started with Android by learning about the <a
 href="{@docRoot}source/life-of-a-patch.html">Life of a Patch</a>, and by
 learning about <code>git</code>, <code>repo</code>, and other tools using the