Inside Snow Leopard's under-the-hood additions

Snow Leopard features several new under-the-hood technologies that, at first glance, might seem to be of interest only to Mac software developers. But those technologies will in fact benefit regular Mac users--if not right now, then in the not-too-distant future. Here's a look at how three of these additions to Snow Leopard--64-bit computing, Grand Central Dispatch, and OpenCL--work and...