Spending good money on a new keyboard or mouse to replace hardware that still works might seem like the height of PC-fashion foolishness. But doing so might be the most cost-effective way to upgrade an aging PC (aside from adding more memory, which never goes out of style).
Keyboards and mice have improved a fair amount in the past few years. The latest models provide brisker mouse tracking, clever scrolling and program-switching options, robust keyboard multimedia controls, and hand-cuddling ergonomics. Most of them have USB and PS/2 connections and work in Windows and the Mac OS.
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