He was interested in everything.
Just about everything but you.
Many people are interested in IT because this field is growing. IT is also a field of the future. Everything seems to be getting computers.
Everything it does is called its function or its ecological niche
the employer is interested in everything about you
Everything. He read a great deal and thought about a lot of things.
When the government controls everything, It is called Command/Communism
The ideal Renaissance man should be interested in everything and know a bit of everything. Leonardo did.
When a corporation owns everything it's called a monopoly.