Demanded languages for programming in VLSI

1.Verilog-recommended book-t.r.padmanabhan
2.VHDL-recommended book-digital system design
3.TCL/TK-recommended book-below tutorial book
4.PYTHON-recommended book-http://www.tutorialspoint.com
5.RUBY-recommended book-http://www.tutorialspoint.com
6.UML-recommended book-http://www.cragsystems.co.uk/uml_tutorial/
7.perl-recommended book-o'reily (by larry wall)
8.specman for testbench automation-requires e language




Tutorial for programming languages
1.tcl tutorial 
2.programming perl
3.AHDL Tutorial 

The Current Official UML Specification:

You can always download the current official version of UML and its associated specifications from our Specifications Catalog page for Modeling and Metadata Specifications athttp://www.omg.org/technology/documents/modeling_spec_catalog.htm#UML