Paul Allen was at the forefront of the personal computer revolution, co-founding Microsoft with his buddy Bill Gates in 1975. And while it has been years since Allen wrote code for the company that made him a billionaire, he’s never lost his love affair with computers. And there’s probably no better place where that passion is on display than Allen’s Living Computer Museum.

Not many folks know the museum exists, in part because the collection of working computers was previously only viewable by appointment. But that changed today when Allen opened up the museum to the public. (Hours are posted on the museum’s Web site, with admission ranging from $2 to $5).

Paul Allen

Featuring working Altairs, Ataris and more, Allen describes the museum as a repository that recognizes “the efforts of those creative engineers who made some of the early breakthroughs in interactive computing that changed the world.”

As part of the grand re-opening, displays have been upgraded and revamped to focus on the history of the machines.

“There are some pretty cool artifacts down there and most of the machines are running and visitors can interact with them,” said Allen spokeswoman Christina Siderius.

Here’s a report on the museum from our partners at KING 5:

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