- Operating systems are employed by users to tell a computer what to do with the resources at its dispose in order to run programs, store data, or send files to peripherals such as plotters and printers. Popular operating systems include DOS, VM and MVS, VMS, UNIX.
FreeBSD is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon 64, and EM64T), Alpha/AXP, IA-64, PC-98 and UltraSPARC® architectures.