Pretty interesting. They use nil pointers everywhere, but also mention a NULL pointer: pc/ether82557.c: NullPointer = 0xFFFFFFFF, /* 82557 N

Pretty interesting. They use nil pointers everywhere, but also mention a NULL pointer: pc/ether82557.c: NullPointer = 0xFFFFFFFF, /* 82557 NULL pointer */ Or qget(): /* * get next block from a queue, return null if nothing there */ if(b == nil){ q->state |= Qstarve; iunlock(q); return nil; } So null and nil pointers. It was always interesting to me; there were null-terminated strings and null-bytes [0], but nil pointers. And then, occasionally, null and NULL pointers. [0] https://www.unix.com/man-page/plan9/2/strcat/ https://www.unix.com/man-page/plan9/2/strcat/ -ss