The only unix clones I can think of off the cuff are GNU/Linux, Minix, QNX and GNU (the Hurd). OSX and the BSDs are all Unixes. HP-UX, AIX and Indiana/Illumos/Solaris/SunOS are/were Unixes.

Javascript/HTML and LAMP is probably the intended content. And by unix clones they probably mean GNU/Linux.