diff --git a/nova/conf/guestfs.py b/nova/conf/guestfs.py
index 11b16f94fe95..b7d3650a1f87 100644
--- a/nova/conf/guestfs.py
+++ b/nova/conf/guestfs.py
@@ -31,7 +31,7 @@ enable_guestfs_debug_opts = [
                 help="""
 Enable/disables guestfs logging.
 
-This configures guestfs to debug messages and push them to Openstack
+This configures guestfs to debug messages and push them to OpenStack
 logging system. When set to True, it traces libguestfs API calls and
 enable verbose debug messages. In order to use the above feature,
 "libguestfs" package must be installed.
diff --git a/nova/conf/notifications.py b/nova/conf/notifications.py
index 6507da0e8f17..c415eca3758f 100644
--- a/nova/conf/notifications.py
+++ b/nova/conf/notifications.py
@@ -22,7 +22,7 @@ notifications_group = cfg.OptGroup(
     help="""
 Most of the actions in Nova which manipulate the system state generate
 notifications which are posted to the messaging component (e.g. RabbitMQ) and
-can be consumed by any service outside the Openstack. More technical details
+can be consumed by any service outside the OpenStack. More technical details
 at https://docs.openstack.org/nova/latest/reference/notifications.html
 """)
 
diff --git a/placement-api-ref/source/index.rst b/placement-api-ref/source/index.rst
index 63338849a14b..fe0feee27f8b 100644
--- a/placement-api-ref/source/index.rst
+++ b/placement-api-ref/source/index.rst
@@ -4,8 +4,8 @@
  Placement API
 ===============
 
-This is a reference for the Openstack Placement API. To learn more about
-Openstack Placement API concepts, please refer to the
+This is a reference for the OpenStack Placement API. To learn more about
+OpenStack Placement API concepts, please refer to the
 `Placement Introduction <https://docs.openstack.org/nova/latest/user/placement.html>`_.
 
 The Placement API uses JSON for data exchange.  As such, the ``Content-Type``
diff --git a/placement-api-ref/source/root.inc b/placement-api-ref/source/root.inc
index 23911106dea9..d6c498c05218 100644
--- a/placement-api-ref/source/root.inc
+++ b/placement-api-ref/source/root.inc
@@ -7,7 +7,7 @@ supports microversioning.  Microversions allow use of certain features on a
 per-request basis via the ``OpenStack-API-Version`` header.  For example, to
 request microversion 1.10, specify the header::
 
-  Openstack-API-Version: placement 1.10
+  OpenStack-API-Version: placement 1.10
 
 For more details about Microversions, please reference:
 `Microversions
diff --git a/placement-api-ref/source/traits.inc b/placement-api-ref/source/traits.inc
index 6b8ca246c90c..240e3acd6aa4 100644
--- a/placement-api-ref/source/traits.inc
+++ b/placement-api-ref/source/traits.inc
@@ -74,7 +74,7 @@ Update traits
 Insert a new custom trait. If traits already exists 204 will be returned.
 
 There are two kinds of traits: the standard traits and the custom traits.
-The standard traits are interoperable across different Openstack cloud
+The standard traits are interoperable across different OpenStack cloud
 deployments. The definition of standard traits comes from the `os-traits`
 library. The standard traits are read-only in the placement API which means
 that the user can't modify any standard traits through API.