
The Indian Information Technology industry accounts for 5.19 per cent of the country's GDP and export earnings as of 2009, while providing employment to a significant number of its tertiary sector workforce.
In 2010-11, annual revenues from IT-BPO sector is estimated to have grown over $76 billion compared to China with $35.76 billion.
Based on a Dataquest IT Industry Survey 2010-11, here are the top IT firms.
1. TCS
Revenue in 2010-11: Rs 29,801 crore (Rs 298.01 billion)
Jump in revenue: 23 per cent
...

2. Infosys
Revenue in 2010-11: Rs 24,477 crore (Rs 244.77 billion)
Jump in revenue: 21 per cent
...

3. Cognizant
Revenue in 2010-11: Rs 21,393 crore (Rs 213.93 billion)
Jump in revenue: 37 per cent
...

4. Wipro Technologies
Revenue in 2010-11: Rs 19,421 crore (Rs 194.21 billion)
Jump in revenue: 16 per cent
...

5. HCL Technologies
Revenue in 2010-11: Rs 13,264 crore (Rs 132.64 billion)
Jump in revenue: 31 per cent
...

6. Hewlett Packard
Revenue in 2010-11: Rs 8,634 crore (Rs 86.34 billion)
Jump in revenue: 29 per cent
...

7. IBM India
Revenue in 2010-11: Rs 7,349 crore (Rs 73.49 billion)
Jump in revenue: 14 per cent
...

8. Accenture India
Revenue in 2010-11: Rs 5,502 crore (Rs 55.02 billion)
Jump in revenue: 23 per cent
...

9. Mahindra Satyam
Revenue in 2010-11: Rs 4,797 crore (Rs 47.97 billion)
Fall in revenue: -1 per cent
...

10. Tech Mahindra
Revenue in 2010-11: Rs 4,144 crore (Rs 41.44 billion)
Fall in revenue: -4 per cent
...

11. Oracle India
Revenue in 2010-11: Rs 3,504 crore (Rs 35.04 billion)
Jump in revenue: 4 per cent
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12. Capgemini India
Revenue in 2010-11: Rs 3,077 crore (Rs 30.77 billion)
Jump in revenue: 28 per cent
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13. Patni
Revenue in 2010-11: Rs 2,920 crore (Rs 29.2 billion)
Fall in revenue: -1 per cent
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14. Aricent
Revenue in 2010-11: Rs 2,502 crore (Rs 25.02 billion)
Jump in revenue: 12 per cent
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15. L&T Infotech
Revenue in 2010-11: Rs 2,311 crore (Rs 23.11 billion)
Jump in revenue: 28 per cent
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16. CSC India
Revenue in 2010-11: Rs 2,267 crore (Rs 22.67 billion)
Jump in revenue: 17 per cent
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17. Syntel
Revenue in 2010-11: Rs 2,178 crore (Rs 21.78 billion)
Jump in revenue: 29 per cent
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18. Polaris Software Lab
Revenue in 2010-11: Rs 1,395 crore (Rs 13.95 billion)
Jump in revenue: 15 per cent
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19. Mindtree Consulting
Revenue in 2010-11: Rs 1,388 crore (Rs 13.88 billion)
Jump in revenue: 15 per cent
...

20. Zylog Systems
Revenue in 2010-11: Rs 1,245 crore (Rs 12.45 billion)
Jump in revenue: 129 per cent