diff --git a/books/free-programming-books-hi.md b/books/free-programming-books-hi.md
index 61166e115..452e843b6 100644
--- a/books/free-programming-books-hi.md
+++ b/books/free-programming-books-hi.md
@@ -1,6 +1,8 @@
 ### Index
 
+* [C](#c)
 * [C++](#cpp)
+* [Computer architecture](#computer-architecture)
 * [Data Structure and Algorithms](#data-structure-and-algorithms)
 * [Java](#java)
 * [Linux](#linux)
@@ -9,7 +11,7 @@
 * [Python](#python)
 
 
-### <a id="c"></a>C
+### C
 
 * [C language Notes by sbistudy.com\| Hindi](https://www.sbistudy.com/c-language-notes-in-hindi/) - Shivom Classes
 * [C Tutorial by Masterprogramming.in \| Hindi](https://masterprogramming.in/learn-c-language-tutorial-in-hindi/) - Jeetu Sahu
@@ -23,6 +25,11 @@
 * [C++ Introduction Book \| Hindi](https://ncsmindia.com/wp-content/uploads/2012/04/c++-hindi.pdf) - NCMS India (PDF)
 
 
+### Computer architecture
+
+* [कम्प्यूटर सिस्टम आर्किटेक्चर](https://www.aicte-india.org/sites/default/files/HINDI_BOOKS/BOOK%207.pdf) - एस. एस. श्रीवास्तव, उच्च शिक्षा उत्कृष्टता संस्थान, भोपाल (म. प्र. ) (PDF)
+
+
 ### Data Structure and Algorithms
 
 * [Data Structure with C \| Hindi](http://www.bccfalna.com/IOC-AllEBooks/DSnAinHindi.pdf) - Kuldeep Chand (PDF)
@@ -56,4 +63,3 @@
 ### Python
 
 * [Python Notes PDF by ehindistudy.com \| Hindi](https://drive.google.com/file/d/1cnJ6Uksso2UXwC5OHBAGk3miMzSveBvr/view) - Yugal Joshi (PDF)
-