BeOS was single user. I don't think it lacked memory protection any more than any other OS that was active at the time (i.e. Mac OS 9 and Windows 95/98.) Also,

BeOS was single user. I don't think it lacked memory protection any more than any other OS that was active at the time (i.e. Mac OS 9 and Windows 95/98.) Also, though it lacked file permissions and multi user security, the hooks were there to add in that type of security, they just never did.