Mentor vs Career Coach

I was wondering what is the difference between a mentor and career coach at work. Here is what I learned today:

A mentor is someone more experienced who shows you the way to do something and help you navigate a preexisting, well-defined path. So, if you are a new hire, joined a new program, ... you can ask a more senior person, a veteran in that position, perhaps your predecessor, to be your mentor and show you how things are done.

A career coach is someone who helps you create a new way, find a new path, to better fulfill your professional goals.  If you are an innovator, entrepreneur, leader, wanting to do something for the first time, build a new initiative or program, develop a company or product, you can benefit from a career coach to create that new way of doing things.

Nybble

It amazes me that during all my years of studies and career as a computer scientist, I just came across the term nibble or nybble, meaning half a byte, or 4 bits.