Differences between Unix & Linux?

The primary difference between the two is that, Unix is just another proprietary binary-only OS or IP-based OS.

1. Linux runs on many hardware platforms.In contrast, a typical Unix is proprietary-hardware -bonded(this hardware tends to be much more expensive than the normal PC clone)

2. Linux look and feel are very similar to Windows, but it is sturdier and richer.While a typical Unix account looks like a mainframe from the 70's.

3. Linux is free, while many Unices(this is supposed to be the plural of unix) are very expensive.But, now a days some unices also available as free.

4. Most of the Linux distribution are compatible with each other.But there are almost thirty different, largely incompatible versions of the Unix OS available today.

I hope the above information will suffice the title.