5400 转，或者 7200 转的机械硬盘。如果你读过我的《深入浅出计算机组成原理》，你一定还记得机械硬盘的 IOPS 也就是在 70 左右

Lisp machine 这种用 Lisp 代码当机器的汇编指令的硬件实现为什么销声匿迹了？硬件和 Lisp 这样的高级语言两个极端如何融合在一起？

They spent $3,000 on a MakerBot Replicator 2 and made a promise to each other: If they could get the 3-D printer to pay for itself in one month by completing orders, they would quit their jobs.

The part arrives a few days later in a cardboard package branded with big, bold letters that spell "Fictiv." (The name is a play on the word "fictive," meaning "creating or created by imagination.") By quickly identifying the shops and machines best suited for each job and intelligently routing orders, Fictiv can offer a far shorter turnaround time than that of traditional manufacturers. The service is designed for low-volume prototype manufacturing but it is capable of handling large orders for thousands of parts. For techies like Will Rehlich, Fictiv's quick approach is critical to the innovative process.