Tesseract is a google open source OCR engine which was developed by Ray smith. This is one of the most accurate OCR engine.For more details you can visit http://code.google.com/p/tesseract-ocr/
This tutorial is for all those viewers who have Windows operating system or Ubuntu installed in their system. This tutorial will explain the following points:-
How to install Virtual Machine( Virtualbox) in your system?
How to install Linux (Ubuntu) in your virtual machine?
Some basic commands to getting stared.