diff --git a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c
index 468dd00ae8..d9e196cbf1 100644
--- a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c
+++ b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.c
@@ -1109,7 +1109,7 @@ NorFlashWriteSingleBlock (
   @retval EFI_SUCCESS           The data was read correctly from the device.
   @retval EFI_DEVICE_ERROR      The device reported an error while performing the read.
   @retval EFI_NO_MEDIA          There is no media in the device.
-  @retval EFI_MEDIA_CHNAGED     The MediaId does not matched the current device.
+  @retval EFI_MEDIA_CHANGED     The MediaId does not match the current device.
   @retval EFI_INVALID_PARAMETER The read request contains device addresses that are not
                                 valid for the device.
 
@@ -1154,7 +1154,7 @@ NorFlashDiskIoReadDisk (
   @retval EFI_WRITE_PROTECTED   The device can not be written to.
   @retval EFI_DEVICE_ERROR      The device reported an error while performing the write.
   @retval EFI_NO_MEDIA          There is no media in the device.
-  @retval EFI_MEDIA_CHNAGED     The MediaId does not matched the current device.
+  @retval EFI_MEDIA_CHANGED     The MediaId does not match the current device.
   @retval EFI_INVALID_PARAMETER The write request contains device addresses that are not
                                  valid for the device.
 
diff --git a/ArmPlatformPkg/Include/Library/ArmPlatformLib.h b/ArmPlatformPkg/Include/Library/ArmPlatformLib.h
index b6cd647d05..225183af2c 100644
--- a/ArmPlatformPkg/Include/Library/ArmPlatformLib.h
+++ b/ArmPlatformPkg/Include/Library/ArmPlatformLib.h
@@ -14,7 +14,7 @@
 //
 #include <PiPei.h>
 //
-// The protocols, PPI and GUID defintions for this module
+// The protocols, PPI and GUID definitions for this module
 //
 #include <Ppi/MasterBootMode.h>
 #include <Ppi/BootInRecoveryMode.h>
diff --git a/ArmPlatformPkg/Include/Library/PL011UartLib.h b/ArmPlatformPkg/Include/Library/PL011UartLib.h
index 7108587350..3bd2e294b0 100644
--- a/ArmPlatformPkg/Include/Library/PL011UartLib.h
+++ b/ArmPlatformPkg/Include/Library/PL011UartLib.h
@@ -112,7 +112,7 @@ PL011UartSetControl (
                          . EFI_SERIAL_OUTPUT_BUFFER_EMPTY : equal to one if the
                            transmit buffer is empty, 0 otherwise.
                          . EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE : equal to one if
-                           the hardware loopback is enabled (the ouput feeds the
+                           the hardware loopback is enabled (the output feeds the
                            receive buffer), 0 otherwise.
                          . EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE : equal to one if
                            a loopback is accomplished by software, 0 otherwise.
diff --git a/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c b/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c
index 20a53be02e..801990d955 100644
--- a/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c
+++ b/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c
@@ -321,7 +321,7 @@ PL011UartSetControl (
                          . EFI_SERIAL_OUTPUT_BUFFER_EMPTY : equal to one if the
                            transmit buffer is empty, 0 otherwise.
                          . EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE : equal to one if
-                           the hardware loopback is enabled (the ouput feeds the
+                           the hardware loopback is enabled (the output feeds the
                            receive buffer), 0 otherwise.
                          . EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE : equal to one if
                            a loopback is accomplished by software, 0 otherwise.
diff --git a/ArmPlatformPkg/MemoryInitPei/MemoryInitPeim.c b/ArmPlatformPkg/MemoryInitPei/MemoryInitPeim.c
index 485dad0ac8..027fa11a89 100644
--- a/ArmPlatformPkg/MemoryInitPei/MemoryInitPeim.c
+++ b/ArmPlatformPkg/MemoryInitPei/MemoryInitPeim.c
@@ -9,7 +9,7 @@
 #include <PiPei.h>
 
 //
-// The protocols, PPI and GUID defintions for this module
+// The protocols, PPI and GUID definitions for this module
 //
 #include <Ppi/MasterBootMode.h>
 #include <Ppi/BootInRecoveryMode.h>
diff --git a/ArmPlatformPkg/PlatformPei/PlatformPeim.c b/ArmPlatformPkg/PlatformPei/PlatformPeim.c
index 27687e9c7e..ca5a31116a 100644
--- a/ArmPlatformPkg/PlatformPei/PlatformPeim.c
+++ b/ArmPlatformPkg/PlatformPei/PlatformPeim.c
@@ -9,7 +9,7 @@
 #include <PiPei.h>
 
 //
-// The protocols, PPI and GUID defintions for this module
+// The protocols, PPI and GUID definitions for this module
 //
 #include <Ppi/MasterBootMode.h>
 #include <Ppi/BootInRecoveryMode.h>
diff --git a/ArmPlatformPkg/PrePeiCore/PrePeiCore.c b/ArmPlatformPkg/PrePeiCore/PrePeiCore.c
index ee4b281760..4911f67577 100644
--- a/ArmPlatformPkg/PrePeiCore/PrePeiCore.c
+++ b/ArmPlatformPkg/PrePeiCore/PrePeiCore.c
@@ -38,7 +38,7 @@ CreatePpiList (
   PlatformPpiListSize = 0;
   ArmPlatformGetPlatformPpiList (&PlatformPpiListSize, &PlatformPpiList);
 
-  // Copy the Common and Platform PPis in Temporrary Memory
+  // Copy the Common and Platform PPis in Temporary Memory
   ListBase = PcdGet64 (PcdCPUCoresStackBase);
   CopyMem ((VOID*)ListBase, gCommonPpiTable, sizeof(gCommonPpiTable));
   CopyMem ((VOID*)(ListBase + sizeof(gCommonPpiTable)), PlatformPpiList, PlatformPpiListSize);
diff --git a/ArmPlatformPkg/PrePi/PrePi.c b/ArmPlatformPkg/PrePi/PrePi.c
index 703bab92ae..2bb1449581 100644
--- a/ArmPlatformPkg/PrePi/PrePi.c
+++ b/ArmPlatformPkg/PrePi/PrePi.c
@@ -193,7 +193,7 @@ CEntryPoint (
         ArmCallSEV ();
       }
     } else {
-      // Wait the Primay core has defined the address of the Global Variable region (event: ARM_CPU_EVENT_DEFAULT)
+      // Wait the Primary core has defined the address of the Global Variable region (event: ARM_CPU_EVENT_DEFAULT)
       ArmCallWFE ();
     }
   }