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Wall Street has slowly moved away from old bulky technology and toward sleeker, faster, more secure solutions. If you traveled back to the early 1980s, the back offices of investment firms would be filled with hulking Cray mainframes the size of restaurant freezers. Now there are rows of small servers and blade racks. The first networks were brought in by traders who wanted to share information among their PCs, which they bought on their own dime, and the CIOs often found out about these new