Offshore outsourcing firms that do most of their work in India remain the largest users of the H-1B visa for computer-related jobs, seemingly unaffected by the odds of the visa lottery, according to new data.

With the exception of a few tech firms — notably Microsoft, Google, Amazon and Oracle — the top 25 H-1B-using firms are either based in India or are U.S. firms running large offshore operations.

These firms include Tata Consultancy Services, the leading H-1B user with 7,149 approved visa petitions for last year, and Infosys, which ranked third on the list at just over 4,000 approved visas. Both were major contractors at Southern California Edison, where IT employees were fired as work was shifted to contractors.

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