Early mice
The mouse was invented by Douglas Engelbart of Stanford Research Institute in 1963, after extensive usability testing. Engelbart's team called it "bug". It was one of several experimental pointing devices developed for Engelbart's oN-Line System (NLS). The other devices were designed to exploit other body movements—for example, head-mounted devices attached to the chin or nose—but ultimately the mouse won out because of its simplicity and convenience
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