а сам как думаешь?
Угу.
The category of Unix-like operating systems clearly includes those systems that have all three of the following characteristics: a direct source code lineage from the original UNIX, obvious UNIX characteristics and officially describe themselves as being UNIX. Source code is the version of software as it is originally written (i.e., typed into a computer) by a human in plain text (i.e., human readable alphanumeric characters). Such systems include AIX (developed by IBM), HP-UX (developed by HP), IRIX (developed by Silicon Graphics), Solaris (developed by Sun Microsystems) and True64 (developed by Compaq for alpha processors and now owned by HP).