[Info-vax] Long uptime cut short by Hurricane Sandy

[Phillip Helbig---undress to reply]

In article
<30cb251a-22f9-43a5-84c5-741ea5209d53 at hl5g2000vbb.googlegroups.com>, AEF
<spamsink2001 at yahoo.com> writes: 

> disc - CD, frisbee (flying disc), phonograph record, DVD, videodisc,
> optical disc (or disk), abbreviation for discount, disc brakes, Blu-
> ray disc
> 
> disk - disk drive; image of a celestial body as visible in a
> telescope, or in the case of the Sun or Moon, also in the naked eye,
> and in the case of a star, which is something too small to be seen as
> a normal disk, a diffraction disk (in naked eye or telescope); slipped
> disk in the backbone

Yes, there are rules, which vary from country to country.  But what ARE 
the rules?  Can you describe them without examples?