Hacker News Reader

Notedly it runs on a very small configuration of an IBM mainframe (z10 BC - 8 GB of RAM), costing less than 100k USD.

Not practical/legal due to IBM licensing, but the open source hercules emulator is stable enough to even run current z/OS on a linux box: http://pastebin.com/umhdBsPu

Reply on news.ycombinator.com