一直聽過什麼B樹， 但一直不知道這個B是什麼意思， 所以來BB一下。

       這個問題其實沒有任何意義， 後來在維基百科上看到了很好的解釋， 一起來看看：

Etymology

The origin of "B-tree" has never been explained by the authors. As we shall see, "balanced," "broad," or "bushy" might apply. Others suggest that the "B" stands for Boeing. Because of his contributions, however, it seems appropriate to think of B-trees as "Bayer"-trees. (

Comer 1979, p. 123 footnote 1)

         Donald Knuth speculates on the etymology of B-trees in his May, 1980 lecture on the topic "CS144C classroom lecture about disk storage and B-trees", suggesting the "B" may have originated from Boeing or from Bayer's name.^[2]

Ed McCreight answered a question on B-tree's name in 2013:

Bayer and I were in a lunchtime where we get to think [of] a name. And ... B is, you know ... We were working for Boeing at the time, we couldn't use the name without talking to lawyers. So, there is a B.

 [The B-tree] has to do with balance, another B. 

Bayer was the senior author, who [was] several years older than I am and had many more publications than I did. So there is another B. 

And so, at the lunch table we never did resolve whether there was one of those that made more sense than the rest. What really lives to say is: the more you think about what the B in B-trees means, the better you understand B-trees."^[3]