CA Technologies is one of the world's largest independent software companies, with revenues of $4.4bn (£2.7bn). The IT infrastructure supplier specialises in software products that help users manage their mainframes and distributed computing environments. Symantec has become renowned for its security and data management products and its anti-virus expertise. It is living proof that security is big business, having grown steadily in the internet boom to become the largest security and data management supplier.
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