Unices is plural of
Unix. Some popular Unices include:
- FreeBSD
- Linux
- Solaris
- Irix
... but there are many other. One of the main differences
windows /
Unix is that there is but
one source of
windoze, but many
Unices.
Linguistic note: People who spell UNIX in all caps don't often use the term Unices, but people who spell Unix like Unix often do.