if you’re very ill, then you may be able to get out of some of them. we built the system to work on any device so students can access it wherever they are. and when you're flying bombs around, you really don't want to lose control of them. it takes advantage of the fact that when the files are still found as files in your computer’s hard drive, they are not actually removed from the system. ), and now she is a great helper, including at school. 