1.  A federal court ruled this month that Napster helped users to violate music copyright laws.

2.  According to the then-prevailing legal opinion, a copyright notice would have tainted its trade secret protections.

3.  An author who does not register a copyright will not be able to maintain a suit against anyone who makes unauthorized copies.

4.  And the same is true of theft, including theft of copyright.

5.  Artists obtain certain rights, collectively known as copyright, on the origination of any artistic work.

6.  Can teachers make photocopies of published materials without violating copyright laws?

7.  Copyright in chapters for a scientific textbook are often bought for sums that would hardly cover the cost of typing.

8.  Descriptions or drawings of ideas are also afforded some protection under copyright law.