diff --git a/wp-admin/includes/user.php b/wp-admin/includes/user.php
index 2e59b552ca..f8c21e34b3 100644
--- a/wp-admin/includes/user.php
+++ b/wp-admin/includes/user.php
@@ -10,7 +10,7 @@
  * Creates a new user from the "Users" form using $_POST information.
  *
  * It seems that the first half is for backwards compatibility, but only
- * has the ability to alter the user's role. Wordpress core seems to
+ * has the ability to alter the user's role. WordPress core seems to
  * use this function only in the second way, running edit_user() with
  * no id so as to create a new user.
  *
diff --git a/wp-config-sample.php b/wp-config-sample.php
index 2e316c7776..c884ff0cd7 100644
--- a/wp-config-sample.php
+++ b/wp-config-sample.php
@@ -68,7 +68,7 @@ define ('WPLANG', '');
 
 /* That's all, stop editing! Happy blogging. */
 
-/** WordPress absolute path to the Wordpress directory. */
+/** Absolute path to the WordPress directory. */
 if ( !defined('ABSPATH') )
 	define('ABSPATH', dirname(__FILE__) . '/');
 
diff --git a/wp-content/themes/default/rtl.css b/wp-content/themes/default/rtl.css
index ba2361b1e5..0583b52f1e 100644
--- a/wp-content/themes/default/rtl.css
+++ b/wp-content/themes/default/rtl.css
@@ -1,7 +1,7 @@
 /*
 Theme name: WordPress Default - kubrick -
 Editors: Navid Kashani
-Persian Wordpress Project : wp-persian.com
+Persian WordPress Project : wp-persian.com
 */
 body, .commentlist li, #commentform input, #commentform textarea, #commentform p, #sidebar, #wp-calendar caption  {
 	font-family:tahoma, arial;
diff --git a/wp-includes/cron.php b/wp-includes/cron.php
index 1c2eda0fb1..416803a9bc 100644
--- a/wp-includes/cron.php
+++ b/wp-includes/cron.php
@@ -8,7 +8,7 @@
 /**
  * Schedules a hook to run only once.
  *
- * Schedules a hook which will be executed once by the Wordpress actions core at
+ * Schedules a hook which will be executed once by the WordPress actions core at
  * a time which you specify. The action will fire off when someone visits your
  * WordPress site, if the schedule time has passed.
  *
diff --git a/wp-includes/formatting.php b/wp-includes/formatting.php
index 85fb579e19..8e9ba1f0e1 100644
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * Main Wordpress Formatting API.
+ * Main WordPress Formatting API.
  *
  * Handles many functions for formatting output.
  *