However, legal issues are unavoidable. Most arcade ROMs are still under copyright. The Internet Archive has faced lawsuits over ROM distribution, and while some rights holders allow archival for defunct systems (e.g., early home computers), commercial arcade titles remain protected. Using "mame4droid 0.139u1 roms archive.org" therefore exists in a gray area: it is a tool for education and preservation, but downloading copyrighted ROMs without owning the original hardware is generally considered infringement.