With IBM's numerous ventures, many successful, many not, they remain the single largest IT company in the world, dominating all others by a large margin. That is a big claim for a company that is younger than many other worldwide businesses, though they were one of the first to have a strong presence in Silicon Valley. This week, IBM's infamous Alamaden Research Center turned 20. Alamaden has been the birthplace of many of IBM's most unique technologies, many of which have a presence all over enterprise environments, such as their PowerPC processor and research into magnetic storage.
IBM has been slowly converting to a services company instead of a hardware company, though it is likely given the size of the business, they will continue to try and innovate in an industry that is fickle enough to see them fall should the tides turn too quickly. It's an interesting piece on the history of the research center, and definitely worth a read.