Billionaire Warren Buffett is known for being reluctant to invest in technology companies, but he now has a Twitter account.

Buffett unveiled his new @WarrenBuffett online handle on Thursday during a speech.

Buffett has always resisted investing in technology companies because he says he can’t predict the future of those businesses the same way he can in insurance or manufacturing businesses.

Buffett says even though he may not understand Twitter well, he knows it can’t be all bad because one of the company’s co-founders is from Nebraska.

Buffett’s first tweet said simply “Warren is in the house.”

Buffett doesn’t have a computer in his office at work, but he does use one at home for research, writing and playing bridge online.