Update free-programming-books-ta.md (#4088)

* Update free-programming-books-ta.md

* Update free-programming-books.md

* Update free-programming-books-ta.md

free-programming-books-ta.md

 ## Index
 
 * [Big Data](#BigData)
+* [CSS](#CSS)
 * [Database](#Database)
 * [HTML](#HTML)
 * [Javascript](#Javascript)
+* [Machine Learning](#MachineLearning)
+* [PHP](#PHP)
+
 
 
 ### BigData
@@ -11,6 +15,11 @@
 * [எளிய தமிழில் Big Data](http://www.kaniyam.com/learn-bigdata-in-tamil-ebooks/)
 
 
+### CSS
+
+* [எளிய தமிழில் CSS](http://www.kaniyam.com/download/learn-css-in-tamil.pdf)
+
+
 ### Database
 
 * [எளிய தமிழில் MySQL ](http://www.kaniyam.com/mysql-book-in-tamil/)
@@ -26,3 +35,13 @@
 
 * [எளிய தமிழில் JavaScript](http://www.kaniyam.com/learn-javascript-in-tamil/)
 
+
+### MachineLearning
+
+* [எளிய தமிழில் ML](http://www.kaniyam.com/download/e0ae8ee0aeb3e0aebfe0aeaf-e0aea4e0aeaee0aebfe0aeb4e0aebfe0aeb2e0af8d-machine-learning-a4-pdf.html)
+
+
+### PHP
+
+* [எளிய தமிழில் PHP](https://freetamilebooks.com/ebooks/learn-php-in-tamil/)
+

free-programming-books.md

@@ -1033,6 +1033,7 @@ Kerridge (PDF) (email address *requested*, not required)
 * [Modern C](https://modernc.gforge.inria.fr) - Jens Gustedt (PDF)
 * [Object-Oriented Programming With ANSI-C](http://www.planetpdf.com/codecuts/pdfs/ooc.pdf) (PDF)
 * [Programming in C](http://ee.hawaii.edu/~tep/EE160/Book/PDF/) - Bharat Kinariwala & Tep Dobry
+* [Programming in C](https://www.freetechbooks.com/programming-in-c-t1337.html) - Kishori Mundargi
 * [Structures and C](https://www.smashwords.com/books/view/644937) - Prakash Hegade
 * [The C book](http://publications.gbdirect.co.uk/c_book/)
 * [The Craft of Text Editing or A Cookbook for an Emacs](http://www.finseth.com/craft/) - Craig A. Finseth