diff --git a/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c b/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c
index 53d11bf9cd..0667fa645d 100644
--- a/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c
+++ b/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c
@@ -47,7 +47,7 @@ gEhciDriverBinding = {
 };
 
 /**
-  Retrieves the capablility of root hub ports.
+  Retrieves the capability of root hub ports.
 
   @param  This                  This EFI_USB_HC_PROTOCOL instance.
   @param  MaxSpeed              Max speed supported by the controller.
diff --git a/MdeModulePkg/Bus/Pci/EhciDxe/EhciDxe.inf b/MdeModulePkg/Bus/Pci/EhciDxe/EhciDxe.inf
index e263528d67..30e40f57f8 100644
--- a/MdeModulePkg/Bus/Pci/EhciDxe/EhciDxe.inf
+++ b/MdeModulePkg/Bus/Pci/EhciDxe/EhciDxe.inf
@@ -1,8 +1,12 @@
 #/** @file
-# Component name for module Ehci
+#  
+#  Component Description File For EhciDxe Module.
+# 
+#  EhciDxe driver is responsible for managing the behavior of EHCI controller. 
+#  It implements the interfaces of monitoring the status of all ports and transferring 
+#  Control, Bulk, Interrupt and Isochronous requests to Usb2.0 device.
 #
-# FIX ME!
-# Copyright (c) 2006, Intel Corporation. 
+#  Copyright (c) 2006 - 2008, Intel Corporation. 
 #
 #  All rights reserved. This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
diff --git a/MdeModulePkg/Bus/Pci/UhciDxe/UhciDxe.inf b/MdeModulePkg/Bus/Pci/UhciDxe/UhciDxe.inf
index d2eb2bfeb7..c4b4bcb444 100644
--- a/MdeModulePkg/Bus/Pci/UhciDxe/UhciDxe.inf
+++ b/MdeModulePkg/Bus/Pci/UhciDxe/UhciDxe.inf
@@ -1,7 +1,12 @@
 #/** @file
-# Component name for module Uhci
+#  
+#  Component Description File For UhciDxe Module.
 #
-# Copyright (c) 2006, Intel Corporation. 
+#  UhciDxe driver is responsible for managing the behavior of UHCI controller. 
+#  It implements the interfaces of monitoring the status of all ports and transferring
+#  Control, Bulk, Interrupt and Isochronous requests to Usb1.x device
+#
+#  Copyright (c) 2006 - 2008, Intel Corporation. 
 #
 #  All rights reserved. This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
diff --git a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBusDxe.inf b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBusDxe.inf
index 8107f66b99..fc36f98e23 100644
--- a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBusDxe.inf
+++ b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBusDxe.inf
@@ -1,7 +1,10 @@
 #/** @file
-# Component name for module UsbBus
+#  
+#  Component Description File For UsbBus Dxe Module.
 #
-# Copyright (c) 2006, Intel Corporation. 
+#  Usb Bus Dxe driver is used to enumerate and manage all attached usb devices.
+#  
+#  Copyright (c) 2006, Intel Corporation. 
 #
 #  All rights reserved. This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License