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Welcome To Tetra tetra Is A Leading Linux Andopen Source Consulting, Business Process Outsourcing & Solutions Provider Company. Headquartered In New Delhi And Branch Offices In Every Continent; We Are In Operation Since 1996, With A Successful Project Implementation History For More Than 150 Corporate. we Are A One Stop Source For All Open Source Needs For Any Organization. We Provide Cost-effective Business Ready Solutions On Services And Subscription Model Using Linux And Open Source.