Contracts

General Rights
First Rights
"First" rights give a publication the right to be first to publish your material in either a particular medium or a particular location. FNASR, for example, generally applies to print publication, within North America. First British rights means the right to publish a piece first within Britain -- even if it has already been published somewhere else. First electronic rights means the right to be first to provide the material in electronic format. Note that one can sell many different variations on "first" rights, as long as these variations don't overlap.


One-time Rights
Just what it says: the publication is purchasing the right to print your piece once and only once. This is not the same as First Rights. First Rights means the publication is buying the right to be the first to publish your piece. If they buy One-time Rights, they will be allowed to print a piece once, but not necessarily first; the piece may have already appeared elsewhere.


Reprint Rights, or Second Serial Rights
When you offer these rights, you have informed the publication that first rights for the piece have been sold, but that the publication can purchase the right from you to print the piece again, as a reprint. Or, to phrase it differently, the right to print the piece a second time.

It's important to note that many publications consider self-published material, or material posted to an author's web site, as previously published. Therefore, first rights to such material cannot be sold to those publications. Check with the publication before offering a piece that has been posted on your website; reprint rights often pay less than first rights.

If you sell Nonexclusive Reprint Rights, you retain the right to sell reprint rights to the same piece to more than one publication, even at the same time. (See "Exclusive vs. Nonexclusive," below.)


Anthology Rights
This gives the publisher of an anthology -- a collection of shorter pieces -- the right to publish your piece in that collection. Anthologies often purchase reprint material. Many magazines that put out annual "Best of" collections negotiate anthology rights with authors whose work has appeared in their magazines.


First World English
The right to be the first in the entire English-speaking world to publish the piece. You won't be able to sell First American, First Canadian, First British, First Australian or FNASR if you sell this right.

You may have realized by now that in some cases, it pays to think small. Sell First World English, and you've eliminated the opportunity to sell First Rights to every English-speaking country in the world. But if you first sell FNASR to that piece, you can then turn around and sell First British, First Australian, First European -- indeed, rights for any geographic area that FNASR does not encompass. If you keep careful track of what geographic rights you've already sold, you can sell your piece around the world, one geographic area at a time.

You can also sell language rights to your piece. A publication may purchase the right to print your story or article in Japanese, German, Russian, or Spanish. These are often called Translation Rights: Spanish Language Translation Rights, and so on.


Excerpt Rights
This means that the purchaser can use excerpts from your piece in other instances. One example of this is the use of an excerpt in an educational environment. An author sold "ten-year nonexclusive excerpt rights" to his story so that portions could be used in a standardized test program.

It may be worth mentioning here that small portions of a work can usually be quoted -- with proper attribution -- in an article or essay by another author. This is termed "fair use." There are legal guidelines pertaining to what is regarded as "fair use," however, and these guidelines vary from country to country. If you intend to quote extensively, or would like to quote material whose use may be denied to outside parties, you should always ask permission from the original copyright owner.

All of these definitions were taken from this website.
http://www.writing-world.com/rights/rights.shtml

Copyright. 

Most clients expect that they own all rights to the image after they have paid for it, but this isn't true unless specified, most contracts are actually of usage of the image not the actual ownership of the image. If a client uses your work for more than what was discussed and specified, you could take it further and sue. You can sell the copyright of an image so that the client owns the image in entirety, this means you have no legal right to show or use your work again in any form unless approved by your client, you can sell the copyright for a lot more money.