Sometimes it seems as though the Internet had been invented to foster manic depression. There's the glee of finding information in a few seconds. Then, the head-banging frustration of waiting as an image fills the screen pixel by excruciating pixel. Most home Net users, in particular, sip data through modems operating at 28.8 kilobits per second. The newest modems offer 56 kilobits per second—not an overwhelming boost.
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