diff --git a/examples/device/cdc_dual_ports/src/usb_descriptors.c b/examples/device/cdc_dual_ports/src/usb_descriptors.c
index f23e42036..8e19678e5 100644
--- a/examples/device/cdc_dual_ports/src/usb_descriptors.c
+++ b/examples/device/cdc_dual_ports/src/usb_descriptors.c
@@ -170,7 +170,8 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = 1;
   }else
   {
-    // Convert ASCII string into UTF-16
+    // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+    // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
 
     if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
 
@@ -180,6 +181,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = strlen(str);
     if ( chr_count > 31 ) chr_count = 31;
 
+    // Convert ASCII string into UTF-16
     for(uint8_t i=0; i<chr_count; i++)
     {
       _desc_str[1+i] = str[i];
diff --git a/examples/device/cdc_msc/src/usb_descriptors.c b/examples/device/cdc_msc/src/usb_descriptors.c
index d6b0d73cc..e13b8189b 100644
--- a/examples/device/cdc_msc/src/usb_descriptors.c
+++ b/examples/device/cdc_msc/src/usb_descriptors.c
@@ -187,7 +187,8 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = 1;
   }else
   {
-    // Convert ASCII string into UTF-16
+    // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+    // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
 
     if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
 
@@ -197,6 +198,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = strlen(str);
     if ( chr_count > 31 ) chr_count = 31;
 
+    // Convert ASCII string into UTF-16
     for(uint8_t i=0; i<chr_count; i++)
     {
       _desc_str[1+i] = str[i];
diff --git a/examples/device/cdc_msc_freertos/src/usb_descriptors.c b/examples/device/cdc_msc_freertos/src/usb_descriptors.c
index 7ce24ee1e..75b5ce7bb 100644
--- a/examples/device/cdc_msc_freertos/src/usb_descriptors.c
+++ b/examples/device/cdc_msc_freertos/src/usb_descriptors.c
@@ -186,7 +186,8 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = 1;
   }else
   {
-    // Convert ASCII string into UTF-16
+    // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+    // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
 
     if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
 
@@ -196,6 +197,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = strlen(str);
     if ( chr_count > 31 ) chr_count = 31;
 
+    // Convert ASCII string into UTF-16
     for(uint8_t i=0; i<chr_count; i++)
     {
       _desc_str[1+i] = str[i];
diff --git a/examples/device/dfu_rt/src/usb_descriptors.c b/examples/device/dfu_rt/src/usb_descriptors.c
index 3d900efd9..8b2bd265d 100644
--- a/examples/device/dfu_rt/src/usb_descriptors.c
+++ b/examples/device/dfu_rt/src/usb_descriptors.c
@@ -139,7 +139,8 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
   }
   else
   {
-    // Convert ASCII string into UTF-16
+    // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+    // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
 
     if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
 
@@ -151,6 +152,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
       chr_count = 31;
     }
 
+    // Convert ASCII string into UTF-16
     for(uint8_t i=0; i<chr_count; i++)
     {
       _desc_str[1+i] = str[i];
diff --git a/examples/device/dynamic_configuration/src/usb_descriptors.c b/examples/device/dynamic_configuration/src/usb_descriptors.c
index a2017f954..9ccb37654 100644
--- a/examples/device/dynamic_configuration/src/usb_descriptors.c
+++ b/examples/device/dynamic_configuration/src/usb_descriptors.c
@@ -218,7 +218,8 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = 1;
   }else
   {
-    // Convert ASCII string into UTF-16
+    // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+    // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
 
     if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
 
@@ -228,6 +229,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = strlen(str);
     if ( chr_count > 31 ) chr_count = 31;
 
+    // Convert ASCII string into UTF-16
     for(uint8_t i=0; i<chr_count; i++)
     {
       _desc_str[1+i] = str[i];
diff --git a/examples/device/hid_composite/src/usb_descriptors.c b/examples/device/hid_composite/src/usb_descriptors.c
index fe46f7d69..5052a436f 100644
--- a/examples/device/hid_composite/src/usb_descriptors.c
+++ b/examples/device/hid_composite/src/usb_descriptors.c
@@ -146,7 +146,8 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = 1;
   }else
   {
-    // Convert ASCII string into UTF-16
+    // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+    // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
 
     if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
 
@@ -156,6 +157,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = strlen(str);
     if ( chr_count > 31 ) chr_count = 31;
 
+    // Convert ASCII string into UTF-16
     for(uint8_t i=0; i<chr_count; i++)
     {
       _desc_str[1+i] = str[i];
diff --git a/examples/device/hid_composite_freertos/src/usb_descriptors.c b/examples/device/hid_composite_freertos/src/usb_descriptors.c
index fe46f7d69..5052a436f 100644
--- a/examples/device/hid_composite_freertos/src/usb_descriptors.c
+++ b/examples/device/hid_composite_freertos/src/usb_descriptors.c
@@ -146,7 +146,8 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = 1;
   }else
   {
-    // Convert ASCII string into UTF-16
+    // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+    // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
 
     if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
 
@@ -156,6 +157,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = strlen(str);
     if ( chr_count > 31 ) chr_count = 31;
 
+    // Convert ASCII string into UTF-16
     for(uint8_t i=0; i<chr_count; i++)
     {
       _desc_str[1+i] = str[i];
diff --git a/examples/device/hid_generic_inout/src/usb_descriptors.c b/examples/device/hid_generic_inout/src/usb_descriptors.c
index 290e12dfd..ef7450e8f 100644
--- a/examples/device/hid_generic_inout/src/usb_descriptors.c
+++ b/examples/device/hid_generic_inout/src/usb_descriptors.c
@@ -144,7 +144,8 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = 1;
   }else
   {
-    // Convert ASCII string into UTF-16
+    // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+    // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
 
     if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
 
@@ -154,6 +155,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = strlen(str);
     if ( chr_count > 31 ) chr_count = 31;
 
+    // Convert ASCII string into UTF-16
     for(uint8_t i=0; i<chr_count; i++)
     {
       _desc_str[1+i] = str[i];
diff --git a/examples/device/midi_test/src/usb_descriptors.c b/examples/device/midi_test/src/usb_descriptors.c
index 4cde914ee..9d92a7753 100644
--- a/examples/device/midi_test/src/usb_descriptors.c
+++ b/examples/device/midi_test/src/usb_descriptors.c
@@ -152,7 +152,8 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = 1;
   }else
   {
-    // Convert ASCII string into UTF-16
+    // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+    // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
 
     if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
 
@@ -162,6 +163,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = strlen(str);
     if ( chr_count > 31 ) chr_count = 31;
 
+    // Convert ASCII string into UTF-16
     for(uint8_t i=0; i<chr_count; i++)
     {
       _desc_str[1+i] = str[i];
diff --git a/examples/device/msc_dual_lun/src/usb_descriptors.c b/examples/device/msc_dual_lun/src/usb_descriptors.c
index ddc3194f7..138de62a3 100644
--- a/examples/device/msc_dual_lun/src/usb_descriptors.c
+++ b/examples/device/msc_dual_lun/src/usb_descriptors.c
@@ -160,7 +160,8 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = 1;
   }else
   {
-    // Convert ASCII string into UTF-16
+    // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+    // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
 
     if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
 
@@ -170,6 +171,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = strlen(str);
     if ( chr_count > 31 ) chr_count = 31;
 
+    // Convert ASCII string into UTF-16
     for(uint8_t i=0; i<chr_count; i++)
     {
       _desc_str[1+i] = str[i];
diff --git a/examples/device/net_lwip_webserver/src/usb_descriptors.c b/examples/device/net_lwip_webserver/src/usb_descriptors.c
index d63816037..f1c0b478c 100644
--- a/examples/device/net_lwip_webserver/src/usb_descriptors.c
+++ b/examples/device/net_lwip_webserver/src/usb_descriptors.c
@@ -200,7 +200,8 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
   }
   else
   {
-    // Convert ASCII string into UTF-16
+    // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+    // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
 
     if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
 
@@ -210,6 +211,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = strlen(str);
     if ( chr_count > (TU_ARRAY_SIZE(_desc_str) - 1)) chr_count = TU_ARRAY_SIZE(_desc_str) - 1;
 
+    // Convert ASCII string into UTF-16
     for (unsigned int i=0; i<chr_count; i++)
     {
       _desc_str[1+i] = str[i];
diff --git a/examples/device/usbtmc/src/usb_descriptors.c b/examples/device/usbtmc/src/usb_descriptors.c
index 86d78e1cd..505456769 100644
--- a/examples/device/usbtmc/src/usb_descriptors.c
+++ b/examples/device/usbtmc/src/usb_descriptors.c
@@ -166,7 +166,8 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
   }
   else
   {
-    // Convert ASCII string into UTF-16
+    // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+    // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
 
     if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
 
@@ -178,6 +179,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
       chr_count = 31;
     }
 
+    // Convert ASCII string into UTF-16
     for(uint8_t i=0; i<chr_count; i++)
     {
       _desc_str[1+i] = str[i];
diff --git a/examples/device/webusb_serial/src/usb_descriptors.c b/examples/device/webusb_serial/src/usb_descriptors.c
index a39b34c3c..4aefdb1f7 100644
--- a/examples/device/webusb_serial/src/usb_descriptors.c
+++ b/examples/device/webusb_serial/src/usb_descriptors.c
@@ -216,7 +216,8 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = 1;
   }else
   {
-    // Convert ASCII string into UTF-16
+    // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+    // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
 
     if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
 
@@ -226,6 +227,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     chr_count = strlen(str);
     if ( chr_count > 31 ) chr_count = 31;
 
+    // Convert ASCII string into UTF-16
     for(uint8_t i=0; i<chr_count; i++)
     {
       _desc_str[1+i] = str[i];