It’s also worth pointing out that this was sued in a copyright lawsuit some time ago. The wikipedia article mentions it, but here’s the slashdot discussion if you want to feel like stepping into a time machine: https://m.slashdot.org/story/158778
It caused a momentary panic when everyone realized that this thing runs the system clocks for everything everywhere, and if it got taken down by a copyright suit it would be disastrous for, well, everybody.
https://en.m.wikipedia.org/wiki/Embrace,_extend,_and_extinguish