diff --git a/MdePkg/Include/Library/PciCf8Lib.h b/MdePkg/Include/Library/PciCf8Lib.h
index 41558dabdd..7e22a527a8 100644
--- a/MdePkg/Include/Library/PciCf8Lib.h
+++ b/MdePkg/Include/Library/PciCf8Lib.h
@@ -1027,7 +1027,7 @@ PciCf8BitFieldAndThenOr32 (
   Size into the buffer specified by Buffer. This function only allows the PCI
   configuration registers from a single PCI function to be read. Size is
   returned. When possible 32-bit PCI configuration read cycles are used to read
-  from StartAdress to StartAddress + Size. Due to alignment restrictions, 8-bit
+  from StartAddress to StartAddress + Size. Due to alignment restrictions, 8-bit
   and 16-bit PCI configuration read cycles may be used at the beginning and the
   end of the range.
 
@@ -1060,7 +1060,7 @@ PciCf8ReadBuffer (
   Size from the buffer specified by Buffer. This function only allows the PCI
   configuration registers from a single PCI function to be written. Size is
   returned. When possible 32-bit PCI configuration write cycles are used to
-  write from StartAdress to StartAddress + Size. Due to alignment restrictions,
+  write from StartAddress to StartAddress + Size. Due to alignment restrictions,
   8-bit and 16-bit PCI configuration write cycles may be used at the beginning
   and the end of the range.
 
diff --git a/MdePkg/Include/Library/PciExpressLib.h b/MdePkg/Include/Library/PciExpressLib.h
index aec2b5f377..826fdcf7db 100644
--- a/MdePkg/Include/Library/PciExpressLib.h
+++ b/MdePkg/Include/Library/PciExpressLib.h
@@ -997,7 +997,7 @@ PciExpressBitFieldAndThenOr32 (
   Size into the buffer specified by Buffer. This function only allows the PCI
   configuration registers from a single PCI function to be read. Size is
   returned. When possible 32-bit PCI configuration read cycles are used to read
-  from StartAdress to StartAddress + Size. Due to alignment restrictions, 8-bit
+  from StartAddress to StartAddress + Size. Due to alignment restrictions, 8-bit
   and 16-bit PCI configuration read cycles may be used at the beginning and the
   end of the range.
 
@@ -1029,7 +1029,7 @@ PciExpressReadBuffer (
   Size from the buffer specified by Buffer. This function only allows the PCI
   configuration registers from a single PCI function to be written. Size is
   returned. When possible 32-bit PCI configuration write cycles are used to
-  write from StartAdress to StartAddress + Size. Due to alignment restrictions,
+  write from StartAddress to StartAddress + Size. Due to alignment restrictions,
   8-bit and 16-bit PCI configuration write cycles may be used at the beginning
   and the end of the range.
 
diff --git a/MdePkg/Include/Library/PciLib.h b/MdePkg/Include/Library/PciLib.h
index 7a7d42050f..836494b6c1 100644
--- a/MdePkg/Include/Library/PciLib.h
+++ b/MdePkg/Include/Library/PciLib.h
@@ -997,7 +997,7 @@ PciBitFieldAndThenOr32 (
   Size into the buffer specified by Buffer. This function only allows the PCI
   configuration registers from a single PCI function to be read. Size is
   returned. When possible 32-bit PCI configuration read cycles are used to read
-  from StartAdress to StartAddress + Size. Due to alignment restrictions, 8-bit
+  from StartAddress to StartAddress + Size. Due to alignment restrictions, 8-bit
   and 16-bit PCI configuration read cycles may be used at the beginning and the
   end of the range.
 
@@ -1029,7 +1029,7 @@ PciReadBuffer (
   Size from the buffer specified by Buffer. This function only allows the PCI
   configuration registers from a single PCI function to be written. Size is
   returned. When possible 32-bit PCI configuration write cycles are used to
-  write from StartAdress to StartAddress + Size. Due to alignment restrictions,
+  write from StartAddress to StartAddress + Size. Due to alignment restrictions,
   8-bit and 16-bit PCI configuration write cycles may be used at the beginning
   and the end of the range.
 
diff --git a/MdePkg/Include/Library/PciSegmentLib.h b/MdePkg/Include/Library/PciSegmentLib.h
index bd31f05a23..fcd98dbfd8 100644
--- a/MdePkg/Include/Library/PciSegmentLib.h
+++ b/MdePkg/Include/Library/PciSegmentLib.h
@@ -984,7 +984,7 @@ PciSegmentBitFieldAndThenOr32 (
   Size into the buffer specified by Buffer. This function only allows the PCI
   configuration registers from a single PCI function to be read. Size is
   returned. When possible 32-bit PCI configuration read cycles are used to read
-  from StartAdress to StartAddress + Size. Due to alignment restrictions, 8-bit
+  from StartAddress to StartAddress + Size. Due to alignment restrictions, 8-bit
   and 16-bit PCI configuration read cycles may be used at the beginning and the
   end of the range.
 
@@ -1016,7 +1016,7 @@ PciSegmentReadBuffer (
   Size from the buffer specified by Buffer. This function only allows the PCI
   configuration registers from a single PCI function to be written. Size is
   returned. When possible 32-bit PCI configuration write cycles are used to
-  write from StartAdress to StartAddress + Size. Due to alignment restrictions,
+  write from StartAddress to StartAddress + Size. Due to alignment restrictions,
   8-bit and 16-bit PCI configuration write cycles may be used at the beginning
   and the end of the range.
 
diff --git a/MdePkg/Library/PciSegmentLibSegmentInfo/DxeRuntimePciSegmentLib.c b/MdePkg/Library/PciSegmentLibSegmentInfo/DxeRuntimePciSegmentLib.c
index b0dbdec0cf..75931d46e0 100644
--- a/MdePkg/Library/PciSegmentLibSegmentInfo/DxeRuntimePciSegmentLib.c
+++ b/MdePkg/Library/PciSegmentLibSegmentInfo/DxeRuntimePciSegmentLib.c
@@ -210,7 +210,7 @@ PciSegmentRegisterForRuntimeAccess (
   Address = (UINTN)EcamAddress;
 
   //
-  // See if Address has already been registerd for runtime access
+  // See if Address has already been registered for runtime access
   //
   for (Index = 0; Index < mDxeRuntimePciSegmentLibNumberOfRuntimeRanges; Index++) {
     if (mDxeRuntimePciSegmentLibRegistrationTable[Index].PhysicalAddress == Address) {
diff --git a/MdePkg/Library/PciSegmentLibSegmentInfo/PciSegmentLibCommon.c b/MdePkg/Library/PciSegmentLibSegmentInfo/PciSegmentLibCommon.c
index 1b42481123..a76e9d9adf 100644
--- a/MdePkg/Library/PciSegmentLibSegmentInfo/PciSegmentLibCommon.c
+++ b/MdePkg/Library/PciSegmentLibSegmentInfo/PciSegmentLibCommon.c
@@ -1169,7 +1169,7 @@ PciSegmentBitFieldAndThenOr32 (
   Size into the buffer specified by Buffer. This function only allows the PCI
   configuration registers from a single PCI function to be read. Size is
   returned. When possible 32-bit PCI configuration read cycles are used to read
-  from StartAdress to StartAddress + Size. Due to alignment restrictions, 8-bit
+  from StartAddress to StartAddress + Size. Due to alignment restrictions, 8-bit
   and 16-bit PCI configuration read cycles may be used at the beginning and the
   end of the range.
 
@@ -1272,7 +1272,7 @@ PciSegmentReadBuffer (
   Size from the buffer specified by Buffer. This function only allows the PCI
   configuration registers from a single PCI function to be written. Size is
   returned. When possible 32-bit PCI configuration write cycles are used to
-  write from StartAdress to StartAddress + Size. Due to alignment restrictions,
+  write from StartAddress to StartAddress + Size. Due to alignment restrictions,
   8-bit and 16-bit PCI configuration write cycles may be used at the beginning
   and the end of the range.