Shareware is a distribution method, not a type of software. You are
given an evaluation period to try the software before you buy it.
Incentives for buying or registering the software can include new
game levels, printed manuals or additional support. The Shareware
system makes fitting your needs easier, because you can try before
you buy. And because the overhead is low, prices are low also. Shareware
has the ultimate money-back guarantee -- if you don't use the product,
you don't pay for it.