diff --git a/embedded_programming/index.html b/embedded_programming/index.html
index 17429e7431011e58485b17b920edc2936073f7a9..1f0a6a815b8bcb55b18ced56d903dadfab2502c3 100644
--- a/embedded_programming/index.html
+++ b/embedded_programming/index.html
@@ -162,7 +162,7 @@
          <a href=https://github.com/v923z/micropython-ulab>ulab</a>
       <a href=https://www.espruino.com/>Espruino</a> <a href=https://kalumajs.org/>Kaluma</a> <a href=https://microsoft.github.io/devicescript/>DeviceScript</a>
 
-<b>AI</b>
+<b><div id="AI"></div>AI</b>
    <i>coding</i>
       <a href=https://chat.openai.com>ChatGPT</a> <a href=https://github.com/features/copilot>Copilot</a> <a href=https://about.gitlab.com/gitlab-duo/>Duo</a> <a href=https://deepseekcoder.github.io>DeepSeek</a>
          <a href=AI/chat.mp4>bugs, hallucination, copyright infringement, ...</a>
diff --git a/input_devices/index.html b/input_devices/index.html
index 7cda5b724525356def9b1d4f831766e924afc45a..4393162240d0416cbed3302fec5ef2e8ffc6440a 100755
--- a/input_devices/index.html
+++ b/input_devices/index.html
@@ -194,7 +194,7 @@
 
 <b><a href=https://www.pololu.com/category/83/gas-sensors>gases</a></b>
 
-<b>image</b>
+<b><div id="image"></div>image</b>
    <a href=https://www.espressif.com/en/products/socs/esp32>ESP32</a>
       <a href=https://www.seeedstudio.com/XIAO-ESP32S3-Sense-p-5639.html>ESP32S3 XIAO Sense</a> <a href=image/hello.ESP32-Sense.jpg>module</a> <a href=https://www.seeedstudio.com/OV5640-Camera-for-XIAO-ESP32S3-Sense-With-Heat-Sink-p-5739.html>camera</a>
          <a href=image/hello.ESP32-Sense.ino>hello.ESP32-Sense.ino</a> <a href=image/hello.ESP32-Sense.mp4>video</a>
diff --git a/wildcard/index.html b/wildcard/index.html
index bfc4c57c1dfdd301262731ff362a590aa06d9fc4..bdeb433c1a5c84148b9b3d1794843454482841a5 100755
--- a/wildcard/index.html
+++ b/wildcard/index.html
@@ -48,8 +48,8 @@
    <a href=http://academy.cba.mit.edu/classes/embedded_programming/index.html>programmable logic</a>
 
 <b>embedded programming</b>
-   <a href=https://www.tensorflow.org/lite/microcontrollers>machine learning</a>
-   <a href=https://learnopencv.com/embedded-computer-vision-which-device-should-you-choose>machine vision</a>
+   <a href=../embedded_programming/index.html#AI>machine learning</a>
+   <a href=../input_devices/index.html#image>machine vision</a>
 
 <b>food</b>
    <a href=https://magazine.columbia.edu/article/all-food-thats-fit-print>printing</a>