Here's our Hardware Tip for.. September 20, 2002
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A New Pointing Device--Part 4 of 4
Hot-swappable pointing devices, like a USB trackball or mouse, let you quickly and easily change pointing devices if a different device is more appropriate for the current task. For example, you might enjoy using a traditional mouse most of the time during a normal computing session, but prefer a trackball or tablet-and-pen device for editing images in Photoshop.

If all of your pointing devices use an interface such as USB, you can attach and detach them whenever you want without rebooting your machine. Older interfaces like serial and parallel ports do not offer this hot-swap capability.