The program's writer knows that one of the best ways to sell users on his product is to let them use it for a while. If the potential buyer liked the program and it met all his requirements, he would then pay for it by sending the writer a registration fee . And, because the writer of the program saved all the costs associated with traditional marketing, he could sell his product at a much lower cost than the commercial programs on the market. That's exactly how shareware works. You'll find shareware that will accomplish just about any computer application you can think of - and some that you can't.
Some shareware is written to do very specific and specialized jobs.
You can find these and general applications programs on the Web. Shareware Shareware is available for computer users in a number of ways these days. You can order it from a shareware vendor who is usually offering a selection of titles for you to purchase through mail order. The vendor publishes a catalog with hundreds of shareware titles that you can order from. The catalogs include short descriptions of the programs to give you an idea of the tasks the program will do.