 Today , FreeBSD is used by many IT companies such as IBM , Nokia , Juniper Networks , and NetApp to build their product . Certain parts of Apple 's Mac OS X operating system are based on FreeBSD . The PlayStation 3 operating system also borrows certain components from FreeBSD , while the PlayStation 4 operating system is derived from FreeBSD 9 . Netflix , WhatsApp , and <unk> are also examples of big , successful and heavily network @-@ oriented companies which are running FreeBSD . 
