BeOS R5 is considered the last official version, but BeOS R5.1 "Dano", which was under development before Be's sale to Palm and included the BeOS Networking Environment (BONE) networking stack, was leaked to the public shortly after the company's demise.
BeOS R5 dianggap versi resmi terakhir, namun BeOS R5.1 "Dano", yang berada di bawah pengembangan sebelum Be dijual ke Palm dan networking stack BeOS Networking Environment (BONE), bocor ke publik sesaat setelah perusahaan terjual.