diff --git a/poky/documentation/ref-manual/ref-classes.xml b/poky/documentation/ref-manual/ref-classes.xml
index ece47e7..5403f20 100644
--- a/poky/documentation/ref-manual/ref-classes.xml
+++ b/poky/documentation/ref-manual/ref-classes.xml
@@ -318,23 +318,6 @@
     </para>
 </section>
 
-<section id='ref-classes-bluetooth'>
-    <title><filename>bluetooth.bbclass</filename></title>
-
-    <para>
-        The <filename>bluetooth</filename> class defines a variable that
-        expands to the recipe (package) providing core
-        bluetooth support on the platform.
-    </para>
-
-    <para>
-        For details on how the class works, see the
-        <filename>meta/classes/bluetooth.bbclass</filename> file in the Yocto
-        Project
-        <link linkend='source-directory'>Source Directory</link>.
-    </para>
-</section>
-
 <section id='ref-classes-buildhistory'>
     <title><filename>buildhistory.bbclass</filename></title>
 
@@ -937,21 +920,6 @@
     </para>
 </section>
 
-<section id='ref-classes-gnome'>
-    <title><filename>gnome.bbclass</filename></title>
-
-    <para>
-        The <filename>gnome</filename> class supports recipes that
-        build software from the GNOME stack.
-        This class inherits the
-        <link linkend='ref-classes-gnomebase'><filename>gnomebase</filename></link>,
-        <link linkend='ref-classes-gtk-icon-cache'><filename>gtk-icon-cache</filename></link>,
-        <link linkend='ref-classes-gconf'><filename>gconf</filename></link> and
-        <link linkend='ref-classes-mime'><filename>mime</filename></link> classes.
-        The class also disables GObject introspection where applicable.
-    </para>
-</section>
-
 <section id='ref-classes-gnomebase'>
     <title><filename>gnomebase.bbclass</filename></title>
 
diff --git a/poky/documentation/ref-manual/ref-devtool-reference.xml b/poky/documentation/ref-manual/ref-devtool-reference.xml
index 4810d28..11f7399 100644
--- a/poky/documentation/ref-manual/ref-devtool-reference.xml
+++ b/poky/documentation/ref-manual/ref-devtool-reference.xml
@@ -629,18 +629,18 @@
         <title>Building Your Recipe</title>
 
         <para>
-            Use the <filename>devtool build</filename> command to cause the
-            OpenEmbedded build system to build your recipe.
+            Use the <filename>devtool build</filename> command to build your
+            recipe.
             The <filename>devtool build</filename> command is equivalent to
-            <filename>bitbake -c populate_sysroot</filename>.
+            the <filename>bitbake -c populate_sysroot</filename> command.
         </para>
 
         <para>
             When you use the <filename>devtool build</filename> command,
-            you must supply the root name of the recipe (i.e. no version,
-            paths, or extensions).
+            you must supply the root name of the recipe (i.e. do not provide
+            versions, paths, or extensions).
             You can use either the "-s" or the "--disable-parallel-make"
-            option to disable parallel makes during the build.
+            options to disable parallel makes during the build.
             Here is an example:
             <literallayout class='monospaced'>
      $ devtool build <replaceable>recipe</replaceable>
diff --git a/poky/documentation/ref-manual/ref-features.xml b/poky/documentation/ref-manual/ref-features.xml
index b057d2d..44ba67c 100644
--- a/poky/documentation/ref-manual/ref-features.xml
+++ b/poky/documentation/ref-manual/ref-features.xml
@@ -154,27 +154,6 @@
                     </para></listitem>
                 <listitem><para><emphasis>bluetooth:</emphasis> Include
                     bluetooth support (integrated BT only).</para></listitem>
-                <listitem><para><emphasis>bluez5:</emphasis> Include
-                    BlueZ Version 5, which provides core Bluetooth layers and
-                    protocols support.
-                    <note>
-                        The default value for the
-                        <filename>DISTRO FEATURES</filename> variable includes
-                        "bluetooth", which causes bluez5 to be backfilled in
-                        for bluetooth support.
-                        If you do not want bluez5 backfilled and would rather
-                        use bluez4, you need to use the
-                        <link linkend='var-DISTRO_FEATURES_BACKFILL_CONSIDERED'><filename>DISTRO_FEATURES_BACKFILL_CONSIDERED</filename></link>
-                        variable as follows:
-                        <literallayout class='monospaced'>
-     DISTRO_FEATURES_BACKFILL_CONSIDERED = "bluez5"
-                        </literallayout>
-                        Setting this variable tells the OpenEmbedded build
-                        system that you have considered but ruled
-                        out using the bluez5 feature and that bluez4 will be
-                        used.
-                    </note>
-                    </para></listitem>
                 <listitem><para><emphasis>cramfs:</emphasis> Include CramFS
                     support.</para></listitem>
                 <listitem><para><emphasis>directfb:</emphasis>
diff --git a/poky/documentation/ref-manual/ref-system-requirements.xml b/poky/documentation/ref-manual/ref-system-requirements.xml
index 239dd84..5199530 100644
--- a/poky/documentation/ref-manual/ref-system-requirements.xml
+++ b/poky/documentation/ref-manual/ref-system-requirements.xml
@@ -95,6 +95,7 @@
                 <listitem><para>CentOS 7.x</para></listitem>
                 <listitem><para>Debian GNU/Linux 8.x (Jessie)</para></listitem>
                 <listitem><para>Debian GNU/Linux 9.x (Stretch)</para></listitem>
+                <listitem><para>Debian GNU/Linux 10.x (Buster)</para></listitem>
                 <listitem><para>OpenSUSE 42.3</para></listitem>
             </itemizedlist>
         </para>
diff --git a/poky/documentation/ref-manual/ref-variables.xml b/poky/documentation/ref-manual/ref-variables.xml
index 0080364..93b7588 100644
--- a/poky/documentation/ref-manual/ref-variables.xml
+++ b/poky/documentation/ref-manual/ref-variables.xml
@@ -335,7 +335,7 @@
             <glossdef>
                 <para role="glossdeffirst">
 <!--                <para role="glossdeffirst"><imagedata fileref="figures/define-generic.png" /> -->
-                    The minimal command and arguments used to run the
+                    Minimal command and arguments needed to run the
                     assembler.
                 </para>
             </glossdef>
@@ -6606,6 +6606,7 @@
                     by default:
                     <literallayout class='monospaced'>
      btrfs
+     container
      cpio
      cpio.gz
      cpio.lz4
@@ -6621,13 +6622,14 @@
      ext3.gz
      ext4
      ext4.gz
-     hdddirect
+     f2fs
      hddimg
      iso
      jffs2
      jffs2.sum
      multiubi
      squashfs
+     squashfs-lz4
      squashfs-lzo
      squashfs-xz
      tar
@@ -7580,15 +7582,9 @@
                         However, providing just the <filename>.dtb</filename>
                         file is preferred.
                     </note>
-                    In order to use this variable, you must have the include
-                    files in your kernel recipe:
-                    <literallayout class='monospaced'>
-     require recipes-kernel/linux/linux-dtb.inc
-                    </literallayout>
-                    or
-                    <literallayout class='monospaced'>
-     require recipes-kernel/linux/linux-yocto.inc
-                    </literallayout>
+                    In order to use this variable, the
+                    <link linkend='ref-classes-kernel-devicetree'><filename>kernel-devicetree</filename></link>
+                    class must be inherited.
                 </para>
             </glossdef>
         </glossentry>