Light is both the chisel that carves chips (lithography) and the paint that makes screens (quantum dots, AR waveguides) — how humans learned to tame it in the space of a silicon chip.

Main memory and video memory came from the same place and then split — one obsesses over latency, the other over bandwidth, and HBM ends up bolting memory onto the GPU's roof.

Hard drives store with magnetism, SSDs trap electrons in an insulator, RAID trades extra disks for reliability — plus the truth behind that scary "RAID 5 rebuild fails 99% of the time."

A circuit that can remember a single 0 or 1, grown step by step into a register — and why cache, not clock speed, is what makes a gaming CPU fast.

From the stray current Edison found in a light bulb to a switch that steers electrons on command — vacuum tube, PN junction, transistor, the short history of taming electricity.

光既是造芯片的刻刀（光刻），也是造屏幕的画笔（量子点、AR 光波导）——人类在硅片方寸之间的驯光记。

内存和显存本是同根生，却走上了两条相反的路——一个死磕延迟，一个死磕带宽，到 HBM 干脆把存储架到了 GPU 头顶。

机械硬盘用磁存、SSD 用电子存、RAID 用多块盘换可靠——以及那个吓人的「RAID 5 重建失败率 99%」到底是真是假。

一个电路怎么记住一件事情？从两个非门互相提醒，到寄存器，再到决定游戏性能的缓存，底层其实是同一个朴素的问题。

从爱迪生那根烧红的灯丝，到能指挥电子的开关——电子管、PN 结、晶体管，一部人类驯电简史。