shareware software just simply means that the application software you are getting is free but for a limited time. from a computer programmer's view, the source code is closed, meaning you cant modify it or change it. they keep the source code closed so no one will copy it or change it, but unlike closed source software, shareware its only allowed for a limited time use. there is a time limit by the company who made the software for you to use, after it was expired, you cant use it. however, there are hackers who crack this software and make it freeware..