diff --git a/doc/asa.rst b/doc/asa.rst
index 4ed64ed6a..41eee96f8 100644
--- a/doc/asa.rst
+++ b/doc/asa.rst
@@ -3,7 +3,7 @@
 Security Advisory
 #################
 
-Addressed in ACRN V2.3
+Addressed in ACRN v2.3
 ************************
 
 We recommend that all developers upgrade to this v2.3 release (or later), which
@@ -19,7 +19,7 @@ addresses the following security issue that was discovered in previous releases:
 
    **Affected Release:** v2.2 and earlier.
 
-Addressed in ACRN V2.1
+Addressed in ACRN v2.1
 ************************
 
 We recommend that all developers upgrade to this v2.1 release (or later), which
@@ -36,7 +36,7 @@ addresses the following security issue that was discovered in previous releases:
 
    **Affected Release:** v2.0 and v1.6.1.
 
-Addressed in ACRN V1.6.1
+Addressed in ACRN v1.6.1
 ************************
 
 We recommend that all developers upgrade to this v1.6.1 release (or later), which
@@ -52,7 +52,7 @@ addresses the following security issue that was discovered in previous releases:
    **Affected Release:** v1.6.
 
 
-Addressed in ACRN V1.6
+Addressed in ACRN v1.6
 **********************
 
 We recommend that all developers upgrade to this v1.6 release (or later), which
@@ -84,7 +84,7 @@ addresses the following security issues that were discovered in previous release
    **Affected Release:** v1.4 and earlier.
 
 
-Addressed in ACRN V1.4
+Addressed in ACRN v1.4
 **********************
 
 We recommend that all developers upgrade to this v1.4 release (or later), which
diff --git a/doc/developer-guides/hld/hld-security.rst b/doc/developer-guides/hld/hld-security.rst
index ab654ef21..3844d1969 100644
--- a/doc/developer-guides/hld/hld-security.rst
+++ b/doc/developer-guides/hld/hld-security.rst
@@ -677,7 +677,7 @@ virtual power life cycle management is out of scope in this document.
 This subsection is intended to describe the security issues for those
 power cycles.
 
-User VM Power on and Shutdown
+User VM Power On and Shutdown
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 The memory of the User VM is allocated dynamically by the DM
diff --git a/doc/release_notes/release_notes_0.1.rst b/doc/release_notes/release_notes_0.1.rst
index a8beaf370..a908239b0 100644
--- a/doc/release_notes/release_notes_0.1.rst
+++ b/doc/release_notes/release_notes_0.1.rst
@@ -1,6 +1,6 @@
 .. _release_notes_0.1:
 
-ACRN V0.1 (July 2018)
+ACRN v0.1 (July 2018)
 #####################
 
 We are pleased to announce the release of Project ACRN version 0.1.
diff --git a/doc/release_notes/release_notes_0.2.rst b/doc/release_notes/release_notes_0.2.rst
index 06ac29891..5d159c672 100644
--- a/doc/release_notes/release_notes_0.2.rst
+++ b/doc/release_notes/release_notes_0.2.rst
@@ -1,6 +1,6 @@
 .. _release_notes_0.2:
 
-ACRN V0.2 (Sep 2018)
+ACRN v0.2 (Sep 2018)
 ####################
 
 We are pleased to announce the release of Project ACRN version 0.2.
diff --git a/doc/release_notes/release_notes_0.3.rst b/doc/release_notes/release_notes_0.3.rst
index d2bf55525..637bccfd1 100644
--- a/doc/release_notes/release_notes_0.3.rst
+++ b/doc/release_notes/release_notes_0.3.rst
@@ -1,6 +1,6 @@
 .. _release_notes_0.3:
 
-ACRN V0.3 (Nov 2018)
+ACRN v0.3 (Nov 2018)
 ####################
 
 We are pleased to announce the release of Project ACRN version 0.3.
diff --git a/doc/release_notes/release_notes_0.4.rst b/doc/release_notes/release_notes_0.4.rst
index 483693887..9eda6bd04 100644
--- a/doc/release_notes/release_notes_0.4.rst
+++ b/doc/release_notes/release_notes_0.4.rst
@@ -1,6 +1,6 @@
 .. _release_notes_0.4:
 
-ACRN V0.4 (Dec 2018)
+ACRN v0.4 (Dec 2018)
 ####################
 
 We are pleased to announce the release of Project ACRN version 0.4.
diff --git a/doc/release_notes/release_notes_0.5.rst b/doc/release_notes/release_notes_0.5.rst
index 9439cbb2f..d5b847c4d 100644
--- a/doc/release_notes/release_notes_0.5.rst
+++ b/doc/release_notes/release_notes_0.5.rst
@@ -1,6 +1,6 @@
 .. _release_notes_0.5:
 
-ACRN V0.5 (Jan 2019)
+ACRN v0.5 (Jan 2019)
 ####################
 
 We are pleased to announce the release of Project ACRN version 0.5.
diff --git a/doc/release_notes/release_notes_0.6.rst b/doc/release_notes/release_notes_0.6.rst
index 794266e5b..694cd5f95 100644
--- a/doc/release_notes/release_notes_0.6.rst
+++ b/doc/release_notes/release_notes_0.6.rst
@@ -1,6 +1,6 @@
 .. _release_notes_0.6:
 
-ACRN V0.6 (Feb 2019)
+ACRN v0.6 (Feb 2019)
 ####################
 
 We are pleased to announce the release of Project ACRN version 0.6.
diff --git a/doc/release_notes/release_notes_0.7.rst b/doc/release_notes/release_notes_0.7.rst
index d476f6143..f7dec94e3 100644
--- a/doc/release_notes/release_notes_0.7.rst
+++ b/doc/release_notes/release_notes_0.7.rst
@@ -1,6 +1,6 @@
 .. _release_notes_0.7:
 
-ACRN V0.7 (Mar 2019)
+ACRN v0.7 (Mar 2019)
 ####################
 
 We are pleased to announce the release of Project ACRN version 0.7.
diff --git a/doc/release_notes/release_notes_0.8.rst b/doc/release_notes/release_notes_0.8.rst
index c02d7535e..15ad5f84a 100644
--- a/doc/release_notes/release_notes_0.8.rst
+++ b/doc/release_notes/release_notes_0.8.rst
@@ -1,6 +1,6 @@
 .. _release_notes_0.8:
 
-ACRN V0.8 (Apr 2019)
+ACRN v0.8 (Apr 2019)
 ####################
 
 We are pleased to announce the release of Project ACRN version 0.8.
diff --git a/doc/release_notes/release_notes_1.0.1.rst b/doc/release_notes/release_notes_1.0.1.rst
index 4039a9ca7..330fcca93 100644
--- a/doc/release_notes/release_notes_1.0.1.rst
+++ b/doc/release_notes/release_notes_1.0.1.rst
@@ -1,6 +1,6 @@
 .. _release_notes_1.0.1:
 
-ACRN V1.0.1 (July 2019)
+ACRN v1.0.1 (July 2019)
 #######################
 
 We are pleased to announce the release of ACRN version 1.0.1. This is a
diff --git a/doc/release_notes/release_notes_1.0.2.rst b/doc/release_notes/release_notes_1.0.2.rst
index 6249c006e..47fd18881 100644
--- a/doc/release_notes/release_notes_1.0.2.rst
+++ b/doc/release_notes/release_notes_1.0.2.rst
@@ -1,6 +1,6 @@
 .. _release_notes_1.0.2:
 
-ACRN V1.0.2 (Nov 2019)
+ACRN v1.0.2 (Nov 2019)
 ######################
 
 We are pleased to announce the release of ACRN version 1.0.2. This is a
@@ -27,7 +27,7 @@ There were no documentation changes in this update, so you can still
 refer to the v1.0-specific documentation found at
 https://projectacrn.github.io/1.0/.
 
-Change Log in V1.0.2 Since V1.0.1
+Change Log in v1.0.2 Since v1.0.1
 *********************************
 
 Primary changes are to fix several security and stability issues found
diff --git a/doc/release_notes/release_notes_1.0.rst b/doc/release_notes/release_notes_1.0.rst
index 1eac4156b..6833935ac 100644
--- a/doc/release_notes/release_notes_1.0.rst
+++ b/doc/release_notes/release_notes_1.0.rst
@@ -1,6 +1,6 @@
 .. _release_notes_1.0:
 
-ACRN V1.0 (May 2019)
+ACRN v1.0 (May 2019)
 ####################
 
 We are pleased to announce the release of ACRN version 1.0, a key
diff --git a/doc/release_notes/release_notes_1.1.rst b/doc/release_notes/release_notes_1.1.rst
index fc8854b27..f2dc82df7 100644
--- a/doc/release_notes/release_notes_1.1.rst
+++ b/doc/release_notes/release_notes_1.1.rst
@@ -1,6 +1,6 @@
 .. _release_notes_1.1:
 
-ACRN V1.1 (Jun 2019)
+ACRN v1.1 (Jun 2019)
 ####################
 
 We are pleased to announce the release of ACRN version 1.1.
diff --git a/doc/release_notes/release_notes_1.2.rst b/doc/release_notes/release_notes_1.2.rst
index fad190b36..e62a55ee3 100644
--- a/doc/release_notes/release_notes_1.2.rst
+++ b/doc/release_notes/release_notes_1.2.rst
@@ -1,6 +1,6 @@
 .. _release_notes_1.2:
 
-ACRN V1.2 (Aug 2019)
+ACRN v1.2 (Aug 2019)
 ####################
 
 We are pleased to announce the release of ACRN version 1.2.
@@ -27,7 +27,7 @@ ACRN v1.2 requires Clear Linux* OS version 30690.
 Version 1.2 Major Features
 **************************
 
-What's New in V1.2
+What's New in v1.2
 ==================
 * Support OVMF as virtual boot loader for Service VM to launch Clearlinux, VxWorks
   or Windows, Secure boot is supported
diff --git a/doc/release_notes/release_notes_1.3.rst b/doc/release_notes/release_notes_1.3.rst
index 260453696..59493e726 100644
--- a/doc/release_notes/release_notes_1.3.rst
+++ b/doc/release_notes/release_notes_1.3.rst
@@ -1,6 +1,6 @@
 .. _release_notes_1.3:
 
-ACRN V1.3 (Sep 2019)
+ACRN v1.3 (Sep 2019)
 ####################
 
 We are pleased to announce the release of ACRN version 1.3.
@@ -27,7 +27,7 @@ ACRN v1.3 requires Clear Linux* OS version 31080.
 Version 1.3 Major Features
 **************************
 
-What's New in V1.3
+What's New in v1.3
 ==================
 * OVMF supports Graphics Output Protocol (GOP), allowing Windows logo at guest
   VM boot time.
diff --git a/doc/release_notes/release_notes_1.4.rst b/doc/release_notes/release_notes_1.4.rst
index f397024e2..3ee1b587f 100644
--- a/doc/release_notes/release_notes_1.4.rst
+++ b/doc/release_notes/release_notes_1.4.rst
@@ -1,6 +1,6 @@
 .. _release_notes_1.4:
 
-ACRN V1.4 (Oct 2019)
+ACRN v1.4 (Oct 2019)
 ####################
 
 We are pleased to announce the release of ACRN version 1.4.
@@ -27,7 +27,7 @@ ACRN v1.4 requires Clear Linux* OS version 31670.
 Version 1.4 Major Features
 **************************
 
-What's New in V1.4
+What's New in v1.4
 ==================
 * ACRN now conforms to the Microsoft* Hypervisor Top-Level Functional Specification (TLFS).
 * ACRN scheduler framework re-architected capabilities have been added.
diff --git a/doc/release_notes/release_notes_1.5.rst b/doc/release_notes/release_notes_1.5.rst
index daf7e7773..5df2f2df3 100644
--- a/doc/release_notes/release_notes_1.5.rst
+++ b/doc/release_notes/release_notes_1.5.rst
@@ -1,6 +1,6 @@
 .. _release_notes_1.5:
 
-ACRN V1.5 (Jan 2020)
+ACRN v1.5 (Jan 2020)
 ####################
 
 We are pleased to announce the release of ACRN version 1.5.
@@ -27,7 +27,7 @@ ACRN v1.5 requires Clear Linux* OS version 32030.
 Version 1.5 Major Features
 **************************
 
-What's New in V1.5
+What's New in v1.5
 ==================
 * Basic CPU sharing: Fairness Round-Robin CPU Scheduling has been added to support basic CPU sharing (the Service VM and WaaG share one CPU core).
 * 8th Gen Intel® Core™ Processors (code name Whiskey Lake) are now supported and validated.
diff --git a/doc/release_notes/release_notes_1.6.1.rst b/doc/release_notes/release_notes_1.6.1.rst
index 92e3ef61f..c7687ab0a 100644
--- a/doc/release_notes/release_notes_1.6.1.rst
+++ b/doc/release_notes/release_notes_1.6.1.rst
@@ -1,6 +1,6 @@
 .. _release_notes_1.6.1:
 
-ACRN V1.6.1 (May 2020)
+ACRN v1.6.1 (May 2020)
 ######################
 
 We are pleased to announce the release of ACRN version 1.6.1.
@@ -28,7 +28,7 @@ ACRN v1.6.1 requires Clear Linux OS version 33050.
 Version 1.6.1 Major Features
 ****************************
 
-What's New in V1.6.1
+What's New in v1.6.1
 ====================
 * ACRN ensures libvirt supports VM orchestration based on OpenStack
 
diff --git a/doc/release_notes/release_notes_1.6.rst b/doc/release_notes/release_notes_1.6.rst
index 0fdd92f29..9a413b092 100644
--- a/doc/release_notes/release_notes_1.6.rst
+++ b/doc/release_notes/release_notes_1.6.rst
@@ -1,6 +1,6 @@
 .. _release_notes_1.6:
 
-ACRN V1.6 (Mar 2020)
+ACRN v1.6 (Mar 2020)
 ####################
 
 We are pleased to announce the release of ACRN version 1.6.
@@ -27,7 +27,7 @@ ACRN v1.6 requires Clear Linux OS version 32680.
 Version 1.6 Major Features
 **************************
 
-What's New in V1.6
+What's New in v1.6
 ==================
 * Graphics passthrough support
 
diff --git a/doc/release_notes/release_notes_2.0.rst b/doc/release_notes/release_notes_2.0.rst
index 9643f07ba..98d6173da 100644
--- a/doc/release_notes/release_notes_2.0.rst
+++ b/doc/release_notes/release_notes_2.0.rst
@@ -1,6 +1,6 @@
 .. _release_notes_2.0:
 
-ACRN V2.0 (Jun 2020)
+ACRN v2.0 (Jun 2020)
 ####################
 
 We are pleased to announce the second major release of the Project ACRN
@@ -55,7 +55,7 @@ started with ACRN.
 
 We recommend that all developers upgrade to ACRN release v2.0.
 
-Version 2.0 Key Features (Comparing With V1.0)
+Version 2.0 Key Features (Comparing With v1.0)
 **********************************************
 
 .. contents::
diff --git a/doc/release_notes/release_notes_2.1.rst b/doc/release_notes/release_notes_2.1.rst
index f297f6722..70cf5540d 100644
--- a/doc/release_notes/release_notes_2.1.rst
+++ b/doc/release_notes/release_notes_2.1.rst
@@ -1,6 +1,6 @@
 .. _release_notes_2.1:
 
-ACRN V2.1 (Aug 2020)
+ACRN v2.1 (Aug 2020)
 ####################
 
 We are pleased to announce the release of the Project ACRN
@@ -33,7 +33,7 @@ ACRN v2.1 requires Ubuntu 18.04.  Follow the instructions in the
 
 We recommend that all developers upgrade to ACRN release v2.1.
 
-What's New in V2.1
+What's New in v2.1
 ******************
 
 * Preempt-RT Linux has been validated as a pre-launched realtime VM. See
diff --git a/doc/release_notes/release_notes_2.2.rst b/doc/release_notes/release_notes_2.2.rst
index 2c6474eaf..3ef8bf639 100644
--- a/doc/release_notes/release_notes_2.2.rst
+++ b/doc/release_notes/release_notes_2.2.rst
@@ -1,6 +1,6 @@
 .. _release_notes_2.2:
 
-ACRN V2.2 (Sep 2020)
+ACRN v2.2 (Sep 2020)
 ####################
 
 We are pleased to announce the release of the Project ACRN
@@ -32,7 +32,7 @@ ACRN v2.2 requires Ubuntu 18.04.  Follow the instructions in the
 :ref:`rt_industry_ubuntu_setup` to get started with ACRN.
 
 
-What's New in V2.2
+What's New in v2.2
 ******************
 
 Elkhart Lake and Tiger Lake processor support.
diff --git a/doc/release_notes/release_notes_2.3.rst b/doc/release_notes/release_notes_2.3.rst
index 8bccf87bc..adf988362 100644
--- a/doc/release_notes/release_notes_2.3.rst
+++ b/doc/release_notes/release_notes_2.3.rst
@@ -1,6 +1,6 @@
 .. _release_notes_2.3:
 
-ACRN V2.3 (Dec 2020)
+ACRN v2.3 (Dec 2020)
 ####################
 
 We are pleased to announce the release of the Project ACRN
@@ -32,7 +32,7 @@ ACRN v2.3 requires Ubuntu 18.04.  Follow the instructions in the
 :ref:`rt_industry_ubuntu_setup` to get started with ACRN.
 
 
-What's New in V2.3
+What's New in v2.3
 ******************
 
 Enhanced GPU passthrough (GVT-d)