diff --git a/docs/api_reference/conf.py b/docs/api_reference/conf.py
index 83fa2e7..f968585 100644
--- a/docs/api_reference/conf.py
+++ b/docs/api_reference/conf.py
@@ -86,6 +86,17 @@ pygments_style = 'sphinx'
 # A list of ignored prefixes for module index sorting.
 #modindex_common_prefix = []
 
+#Option to add text substitutions to all .rst files being built.
+rst_prolog = """
+.. |freenas| replace:: FreeNAS"""u'\u00AE'"""
+.. |truenas| replace:: TrueNAS"""u'\u00AE'"""
+.. |pcbsd| replace:: PC-BSD"""u'\u00AE'"""
+.. |trueos| replace:: TrueOS"""u'\u00AE'"""
+.. |appcafe| replace:: AppCafe"""u'\u00AE'"""
+.. |lumina| replace:: Lumina"""u'\u00AE'"""
+.. |sysadm| replace:: SysAdm"""u'\u2122'"""
+"""
+
 # -- Option to change :menuselection: arrow -----------------------------
 
 from docutils import nodes, utils
diff --git a/docs/client_handbook/conf.py b/docs/client_handbook/conf.py
index 49510e5..7a42747 100644
--- a/docs/client_handbook/conf.py
+++ b/docs/client_handbook/conf.py
@@ -120,6 +120,17 @@ pygments_style = 'sphinx'
 # If true, `todo` and `todoList` produce output, else they produce nothing.
 todo_include_todos = True
 
+#Option to add text substitutions to all .rst files being built.
+rst_prolog = """
+.. |freenas| replace:: FreeNAS"""u'\u00AE'"""
+.. |truenas| replace:: TrueNAS"""u'\u00AE'"""
+.. |pcbsd| replace:: PC-BSD"""u'\u00AE'"""
+.. |trueos| replace:: TrueOS"""u'\u00AE'"""
+.. |appcafe| replace:: AppCafe"""u'\u00AE'"""
+.. |lumina| replace:: Lumina"""u'\u00AE'"""
+.. |sysadm| replace:: SysAdm"""u'\u2122'"""
+"""
+
 # -- Option to change :menuselection: arrow -----------------------------
 
 from docutils import nodes, utils
diff --git a/docs/server_handbook/conf.py b/docs/server_handbook/conf.py
index d406273..62ea8e7 100644
--- a/docs/server_handbook/conf.py
+++ b/docs/server_handbook/conf.py
@@ -86,6 +86,17 @@ pygments_style = 'sphinx'
 # A list of ignored prefixes for module index sorting.
 #modindex_common_prefix = []
 
+#Option to add text substitutions to all .rst files being built.
+rst_prolog = """
+.. |freenas| replace:: FreeNAS"""u'\u00AE'"""
+.. |truenas| replace:: TrueNAS"""u'\u00AE'"""
+.. |pcbsd| replace:: PC-BSD"""u'\u00AE'"""
+.. |trueos| replace:: TrueOS"""u'\u00AE'"""
+.. |appcafe| replace:: AppCafe"""u'\u00AE'"""
+.. |lumina| replace:: Lumina"""u'\u00AE'"""
+.. |sysadm| replace:: SysAdm"""u'\u2122'"""
+"""
+
 # -- Option to change :menuselection: arrow -----------------------------
 
 from docutils import nodes, utils