what are the three software types
free software, freeware, shareware
whats a freesoftware
users have the freedom to run, copy, change or adopt free software
what are rules for ethics
cannot add source code except from software that is also free software
cannot produce software which copies existing software (copyright)
cannot alter the sourcecode so that it goes against the copyright of other codes
cannot produce software that is offensive
whats freeware
software a user can download thats free of charge but are subject to copyright laws (eg. skype)
whats shareware
users can try out shareware for a trial period. cannot modify code or distribute the software