The original “hello, world” program, Written in B (1972)

it is strange the "extrn" word in B language instead "extern" in C language: http://stackoverflow.com/questions/11295982/extern-or-extrn-...

I'm confused: this link doesn't go to what the title says.

Why are there files from 1972 in the Go repository?

My god. It's full of ugly.