Hi,
A few interesting stats about IT.

1) Turnover / Market Size

- Total Turnover of All IT Companies in India (Including MNCs, BPO, ITES, KPO) - 40 Billion USD
- Toatal Market Size of All IT Services in US (550 Billion USD)

Compare this with??

- Total Turnover of Reliance Industries 27 BILLION USD

2) Market Cap

- Market Cap of all Indian IT Companies Close to 60 Billion USD

Compare this with??

- Market Cap of Reliance Industries 60 BILLION USD (RIL alone not including Reliance Communications, Reliance Petroleum, Reliance Capital, Reliance Energy, RNRL etc. etc.)
So Reliance = All IT Companies in India put together.

3) Number of Emplyees

-IT Industry 1.6 Million

Compare this with??

Reliance = 12000 Employees, this year 24000 due to addition of Reliance Retail.

So now you know why Reliance didn't enter the IT Field.