The term "Keyboard 3000" is not a single, universally recognized product. Instead, it refers to several keyboard models across different eras and brands. Below are the three most common meanings. 1. Microsoft Natural Ergonomic Keyboard 4000 (Often Confused with "3000") While the exact model is Microsoft Natural Ergonomic Keyboard 4000 , many users and resellers have mistakenly referred to it as the "3000" due to its predecessor, the Microsoft Natural Keyboard Elite (which lacked a number). The 4000 became the gold standard for ergonomic keyboards from the mid-2000s to the 2010s.