在TopLanguage看过一篇《PC体系结构静悄悄地革命》，当时就对SSD留下了非常深刻的印象。第一次听说memristor这个玩意儿还是在cnbeta《HP科学家创造了第一个Memristor:遗失的第四种电子电路元件》。当时以为memristor也就是吹吹牛，过几年就销声匿迹了。没想到，看了highscalability的报道，让人很震撼

A memristor is a pipe that changes diameter with the amount and direction of water that flows through it. If water flows through this pipe in one direction, it expands (becoming less resistive). But send the water in the opposite direction and the pipe shrinks (becoming more resistive). Further, the memristor remembers its diameter when water last went through. Turn off the flow and the diameter of the pipe ”freezes” until the water is turned back on. That freezing property suits memristors brilliantly for computer memory. The ability to indefinitely store resistance values means that a memristor can be used as a nonvolatile memory.

理论的提出是华裔 蔡少棠 Leon O. Chua。一个能同时替代RAM, SSD（Non-volatile memory）和CPU的元器件，这个改变太吓人了。1cm²的平面上可以存Pbit级别的数据。。。还可以进行类似NAND门的逻辑运算。。。可以用来模拟类似大脑神经元突触。。。HP实验室用的是光路，而不是电路。。。。。这简直是唤醒AI的神物啊。。。。

有个视频

但是至今还只是发现了这个玩意儿，还没有一个被生产出来。。也不知道价格适不适合商业化。。。期待吧。。。

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