Vintage Computer Festival West XIII is this weekend (Aug. 4-5) at the Computer History Museum (Mountain View, California).
The hours are Saturday 9am-6pm and Sunday 9am-5:30pm.
You'll find dozens of hands-on exhibits of historic computing gear, lectures, a consignment booth, museum tours, and more.
Proceeds benefit Vintage Computer Federation, which is a 501©(3) educational non-profit organization.
Event details are at http://www.vcfed.org/vcfwest.