diff --git a/MdeModulePkg/Bus/Isa/IsaBusDxe/IsaBusDxe.c b/MdeModulePkg/Bus/Isa/IsaBusDxe/IsaBusDxe.c
index af4041081d..ccda7c3f70 100644
--- a/MdeModulePkg/Bus/Isa/IsaBusDxe/IsaBusDxe.c
+++ b/MdeModulePkg/Bus/Isa/IsaBusDxe/IsaBusDxe.c
@@ -109,7 +109,7 @@ ISA_BUS_CHILD_PRIVATE_DATA mIsaBusChildPrivateTemplate = {
                       then a new handle is created. If it is a pointer to an existing UEFI handle,
                       then the protocol is added to the existing UEFI handle.
 
-  @retval EFI_SUCCES            The protocol was added to ChildHandle.
+  @retval EFI_SUCCESS           The protocol was added to ChildHandle.
   @retval EFI_INVALID_PARAMETER ChildHandle is NULL.
   @retval EFI_OUT_OF_RESOURCES  There are not enough resources available to create
                                 the child
@@ -166,7 +166,7 @@ IsaBusCreateChild (
   @param  This        Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.
   @param  ChildHandle Handle of the child to destroy
 
-  @retval EFI_SUCCES            The protocol was removed from ChildHandle.
+  @retval EFI_SUCCESS           The protocol was removed from ChildHandle.
   @retval EFI_UNSUPPORTED       ChildHandle does not support the protocol that is being removed.
   @retval EFI_INVALID_PARAMETER Child handle is NULL.
   @retval EFI_ACCESS_DENIED     The protocol could not be removed from the ChildHandle
@@ -272,7 +272,7 @@ ISA_BUS_PRIVATE_DATA   mIsaBusPrivateTemplate = {
   @retval EFI_SUCCESS              The device was started.
   @retval EFI_DEVICE_ERROR         The device could not be started due to a device error.Currently not implemented.
   @retval EFI_OUT_OF_RESOURCES     The request could not be completed due to a lack of resources.
-  @retval Others                   The driver failded to start the device.
+  @retval Others                   The driver failed to start the device.
 
 **/
 EFI_STATUS
diff --git a/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KbdCtrller.c b/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KbdCtrller.c
index 87f6efd8dd..d8d050b0a9 100644
--- a/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KbdCtrller.c
+++ b/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KbdCtrller.c
@@ -799,7 +799,7 @@ KeyboardTimerHandler (
   //
   // To let KB driver support Hot plug, here should skip the 'resend' command  for the case that
   // KB is not connected to system. If KB is not connected to system, driver will find there's something
-  // error in the following code and wait for the input buffer empty, this waiting time shoulb be short enough since
+  // error in the following code and wait for the input buffer empty, this waiting time should be short enough since
   // this is a NOTIFY TPL period function, or the system performance will degrade hardly when KB is not connected.
   // Just skip the 'resend' process simply.
   //
@@ -827,7 +827,7 @@ KeyboardTimerHandler (
   @param ConsoleIn - Pointer to instance of KEYBOARD_CONSOLE_IN_DEV
   @param Data      - Pointer to outof buffer for keeping key value
 
-  @retval EFI_TIMEOUT Status resigter time out
+  @retval EFI_TIMEOUT Status register time out
   @retval EFI_SUCCESS Success to read keyboard
 
 **/
@@ -871,7 +871,7 @@ KeyboardRead (
   @param Data      value wanted to be written
 
   @retval EFI_TIMEOUT   The input buffer register is full for putting new value util timeout
-  @retval EFI_SUCCESS   The new value is sucess put into input buffer register.
+  @retval EFI_SUCCESS   The new value is success put into input buffer register.
 
 **/
 EFI_STATUS
@@ -1688,7 +1688,7 @@ InitKeyboard (
     if (EFI_ERROR (Status)) {
       KeyboardError (
         ConsoleIn,
-        L"Some specific value not aquired from 8042 controller!\n\r"
+        L"Some specific value not acquired from 8042 controller!\n\r"
         );
       goto Done;
     }
@@ -1703,7 +1703,7 @@ InitKeyboard (
 
     Status = KeyboardWaitForValue (ConsoleIn, KEYBOARD_8048_RETURN_8042_ACK);
     if (EFI_ERROR (Status)) {
-      KeyboardError (ConsoleIn, L"Some specific value not aquired from 8042 controller!\n\r");
+      KeyboardError (ConsoleIn, L"Some specific value not acquired from 8042 controller!\n\r");
       goto Done;
     }
     //
@@ -1730,7 +1730,7 @@ InitKeyboard (
 
     Status = KeyboardWaitForValue (ConsoleIn, KEYBOARD_8048_RETURN_8042_ACK);
     if (EFI_ERROR (Status)) {
-      KeyboardError (ConsoleIn, L"Some specific value not aquired from 8042 controller!\n\r");
+      KeyboardError (ConsoleIn, L"Some specific value not acquired from 8042 controller!\n\r");
       goto Done;
     }
 
@@ -1742,7 +1742,7 @@ InitKeyboard (
 
     Status = KeyboardWaitForValue (ConsoleIn, KEYBOARD_8048_RETURN_8042_ACK);
     if (EFI_ERROR (Status)) {
-      KeyboardError (ConsoleIn, L"Some specific value not aquired from 8042 controller!\n\r");
+      KeyboardError (ConsoleIn, L"Some specific value not acquired from 8042 controller!\n\r");
       goto Done;
     }
 
@@ -1757,7 +1757,7 @@ InitKeyboard (
 
   Status = KeyboardWaitForValue (ConsoleIn, KEYBOARD_8048_RETURN_8042_ACK);
   if (EFI_ERROR (Status)) {
-    KeyboardError (ConsoleIn, L"Some specific value not aquired from 8042 controller!\n\r");
+    KeyboardError (ConsoleIn, L"Some specific value not acquired from 8042 controller!\n\r");
     goto Done;
   }
   //
diff --git a/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KbdTextIn.c b/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KbdTextIn.c
index 458519cb71..835f33cfa8 100644
--- a/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KbdTextIn.c
+++ b/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KbdTextIn.c
@@ -77,7 +77,7 @@ PushEfikeyBufTail (
 }
 
 /**
-  Judge whether is a registed key
+  Judge whether is a registered key
 
   @param RegsiteredData       A pointer to a buffer that is filled in with the keystroke
                               state data for the key that was registered.
@@ -85,7 +85,7 @@ PushEfikeyBufTail (
                               state data for the key that was pressed.
 
   @retval TRUE                Key be pressed matches a registered key.
-  @retval FLASE               Match failed.
+  @retval FALSE               Match failed.
 
 **/
 BOOLEAN
@@ -120,7 +120,7 @@ IsKeyRegistered (
 
 /**
     Reads the next keystroke from the input device. The WaitForKey Event can
-    be used to test for existance of a keystroke via WaitForEvent () call.
+    be used to test for existence of a keystroke via WaitForEvent () call.
 
     @param ConsoleInDev          Ps2 Keyboard private structure
     @param KeyData               A pointer to a buffer that is filled in with the keystroke
@@ -128,7 +128,7 @@ IsKeyRegistered (
 
 
     @retval EFI_SUCCESS             The keystroke information was returned.
-    @retval EFI_NOT_READY           There was no keystroke data availiable.
+    @retval EFI_NOT_READY           There was no keystroke data available.
     @retval EFI_DEVICE_ERROR        The keystroke information was not returned due to
                                     hardware errors.
     @retval EFI_INVALID_PARAMETER   KeyData is NULL.
@@ -308,7 +308,7 @@ KeyboardReadKeyStroke (
   Signal the event if there is key available
 
   @param Event    the event object
-  @param Context  waitting context
+  @param Context  waiting context
 
 **/
 VOID
@@ -333,7 +333,7 @@ KeyboardWaitForKey (
 
   if (!ConsoleIn->KeyboardErr) {
     //
-    // WaitforKey doesn't suppor the partial key.
+    // WaitforKey doesn't support the partial key.
     // Considering if the partial keystroke is enabled, there maybe a partial
     // keystroke in the queue, so here skip the partial keystroke and get the
     // next key from the queue
@@ -381,7 +381,7 @@ KeyboardWaitForKeyEx (
 }
 
 /**
-  Reset the input device and optionaly run diagnostics
+  Reset the input device and optionally run diagnostics
 
   @param This                     Protocol instance pointer.
   @param ExtendedVerification     Driver may perform diagnostics on reset.
@@ -411,7 +411,7 @@ KeyboardEfiResetEx (
 
 /**
     Reads the next keystroke from the input device. The WaitForKey Event can
-    be used to test for existance of a keystroke via WaitForEvent () call.
+    be used to test for existence of a keystroke via WaitForEvent () call.
 
 
     @param This         Protocol instance pointer.
@@ -419,7 +419,7 @@ KeyboardEfiResetEx (
                         state data for the key that was pressed.
 
     @retval EFI_SUCCESS           The keystroke information was returned.
-    @retval EFI_NOT_READY         There was no keystroke data availiable.
+    @retval EFI_NOT_READY         There was no keystroke data available.
     @retval EFI_DEVICE_ERROR      The keystroke information was not returned due to
                                   hardware errors.
     @retval EFI_INVALID_PARAMETER KeyData is NULL.
@@ -540,7 +540,7 @@ Exit:
     @param NotifyHandle               Points to the unique handle assigned to the registered notification.
 
     @retval EFI_SUCCESS               The notification function was registered successfully.
-    @retval EFI_OUT_OF_RESOURCES      Unable to allocate resources for necesssary data structures.
+    @retval EFI_OUT_OF_RESOURCES      Unable to allocate resources for necessary data structures.
     @retval EFI_INVALID_PARAMETER     KeyData or NotifyHandle or KeyNotificationFunction is NULL.
 
 **/
diff --git a/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2Keyboard.c b/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2Keyboard.c
index 2ee3a52ee5..855fda742e 100644
--- a/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2Keyboard.c
+++ b/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2Keyboard.c
@@ -77,7 +77,7 @@ KbdControllerDriverStop (
   @param ListHead  Pointer to list head
 
   @retval EFI_INVALID_PARAMETER  ListHead is NULL
-  @retval EFI_SUCCESS            Sucess to free NotifyList
+  @retval EFI_SUCCESS            Success to free NotifyList
 **/
 EFI_STATUS
 KbdFreeNotifyList (
@@ -597,7 +597,7 @@ KbdControllerDriverStop (
   @param ListHead  Pointer to list head
 
   @retval EFI_INVALID_PARAMETER  ListHead is NULL
-  @retval EFI_SUCCESS            Sucess to free NotifyList
+  @retval EFI_SUCCESS            Success to free NotifyList
 **/
 EFI_STATUS
 KbdFreeNotifyList (
diff --git a/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2Keyboard.h b/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2Keyboard.h
index 3666ebc85e..c2762db038 100644
--- a/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2Keyboard.h
+++ b/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2Keyboard.h
@@ -352,7 +352,7 @@ KeyboardReadKeyStroke (
   Signal the event if there is key available
 
   @param Event    the event object
-  @param Context  waitting context
+  @param Context  waiting context
 
 **/
 VOID
@@ -411,7 +411,7 @@ KeyboardWaitForKeyEx (
 //
 
 /**
-  Reset the input device and optionaly run diagnostics
+  Reset the input device and optionally run diagnostics
 
   @param This                 - Protocol instance pointer.
   @param ExtendedVerification - Driver may perform diagnostics on reset.
@@ -430,7 +430,7 @@ KeyboardEfiResetEx (
 
 /**
     Reads the next keystroke from the input device. The WaitForKey Event can
-    be used to test for existance of a keystroke via WaitForEvent () call.
+    be used to test for existence of a keystroke via WaitForEvent () call.
 
 
     @param This       - Protocol instance pointer.
@@ -438,7 +438,7 @@ KeyboardEfiResetEx (
                  state data for the key that was pressed.
 
     @retval EFI_SUCCESS           - The keystroke information was returned.
-    @retval EFI_NOT_READY         - There was no keystroke data availiable.
+    @retval EFI_NOT_READY         - There was no keystroke data available.
     @retval EFI_DEVICE_ERROR      - The keystroke information was not returned due to
                             hardware errors.
     @retval EFI_INVALID_PARAMETER - KeyData is NULL.
@@ -486,7 +486,7 @@ KeyboardSetState (
     @param NotifyHandle            - Points to the unique handle assigned to the registered notification.
 
     @retval EFI_SUCCESS             - The notification function was registered successfully.
-    @retval EFI_OUT_OF_RESOURCES    - Unable to allocate resources for necesssary data structures.
+    @retval EFI_OUT_OF_RESOURCES    - Unable to allocate resources for necessary data structures.
     @retval EFI_INVALID_PARAMETER   - KeyData or NotifyHandle is NULL.
 
 **/
@@ -531,7 +531,7 @@ PushEfikeyBufTail (
   );
 
 /**
-  Judge whether is a registed key
+  Judge whether is a registered key
 
   @param RegsiteredData       A pointer to a buffer that is filled in with the keystroke
                               state data for the key that was registered.
@@ -539,7 +539,7 @@ PushEfikeyBufTail (
                               state data for the key that was pressed.
 
   @retval TRUE                Key be pressed matches a registered key.
-  @retval FLASE               Match failed.
+  @retval FALSE               Match failed.
 
 **/
 BOOLEAN
diff --git a/MdeModulePkg/Bus/Isa/Ps2MouseDxe/CommPs2.c b/MdeModulePkg/Bus/Isa/Ps2MouseDxe/CommPs2.c
index 4eb30276cd..d8fed87c16 100644
--- a/MdeModulePkg/Bus/Isa/Ps2MouseDxe/CommPs2.c
+++ b/MdeModulePkg/Bus/Isa/Ps2MouseDxe/CommPs2.c
@@ -775,7 +775,7 @@ CheckForInput (
 /**
   I/O work flow to wait input buffer empty in given time.
 
-  @param Timeout Wating time.
+  @param Timeout Waiting time.
 
   @retval EFI_TIMEOUT if input is still not empty in given time.
   @retval EFI_SUCCESS input is empty.
diff --git a/MdeModulePkg/Bus/Isa/Ps2MouseDxe/CommPs2.h b/MdeModulePkg/Bus/Isa/Ps2MouseDxe/CommPs2.h
index 61380a4d1f..60da421211 100644
--- a/MdeModulePkg/Bus/Isa/Ps2MouseDxe/CommPs2.h
+++ b/MdeModulePkg/Bus/Isa/Ps2MouseDxe/CommPs2.h
@@ -362,7 +362,7 @@ CheckForInput (
 /**
   I/O work flow to wait input buffer empty in given time.
 
-  @param Timeout Wating time.
+  @param Timeout Waiting time.
 
   @retval EFI_TIMEOUT if input is still not empty in given time.
   @retval EFI_SUCCESS input is empty.
diff --git a/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2Mouse.c b/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2Mouse.c
index fd34e3eaf8..ebcb2a43dc 100644
--- a/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2Mouse.c
+++ b/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2Mouse.c
@@ -587,8 +587,8 @@ MouseReset (
 
   Status = EFI_SUCCESS;
   //
-  // The PS2 mouse driver reset behavior is always successfully return no matter wheater or not there is mouse connected to system.
-  // This behavior is needed by performance speed. The following mouse command only succeessfully finish when mouse device is
+  // The PS2 mouse driver reset behavior is always successfully return no matter whether or not there is mouse connected to system.
+  // This behavior is needed by performance speed. The following mouse command only successfully finish when mouse device is
   // connected to system, so if PS2 mouse device not connect to system or user not ask for, we skip the mouse configuration and enabling
   //
   if (ExtendedVerification && CheckMouseConnect (MouseDev)) {
diff --git a/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2Mouse.h b/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2Mouse.h
index df2e283f6d..1f7c310ad1 100644
--- a/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2Mouse.h
+++ b/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2Mouse.h
@@ -124,7 +124,7 @@ PS2MouseDriverSupported (
 /**
   Start this driver on ControllerHandle by opening a IsaIo
   protocol, creating PS2_MOUSE_ABSOLUTE_POINTER_DEV device and install gEfiAbsolutePointerProtocolGuid
-  finnally.
+  finally.
 
   @param  This                 Protocol instance pointer.
   @param  ControllerHandle     Handle of device to bind driver to
diff --git a/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2MouseDxe.inf b/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2MouseDxe.inf
index cf2699c1d9..7e801ecd1f 100644
--- a/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2MouseDxe.inf
+++ b/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2MouseDxe.inf
@@ -1,7 +1,7 @@
 ## @file
 # PS2 Mouse Driver.
 #
-# This dirver provides support for PS2 based mice.
+# This driver provides support for PS2 based mice.
 #
 # Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
 #
diff --git a/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2MouseDxe.uni b/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2MouseDxe.uni
index 9e153e76db..e41869a013 100644
--- a/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2MouseDxe.uni
+++ b/MdeModulePkg/Bus/Isa/Ps2MouseDxe/Ps2MouseDxe.uni
@@ -1,7 +1,7 @@
 // /** @file
 // PS2 Mouse Driver.
 //
-// This dirver provides support for PS2 based mice.
+// This driver provides support for PS2 based mice.
 //
 // Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
 //