I have done IT consulting for a company like this. Even though they were the world market leader they were so low profile that the CEO would usually pick up the

I have done IT consulting for a company like this. Even though they were the world market leader they were so low profile that the CEO would usually pick up the phone when I called them. There was no big secret behind it. It's just that their whole market was like 20 companies worldwide served by maybe 7 providers of which 2-3 actually counted.