For tourists with an interest in Seattle’s role as a high-tech hub, there hasn’t been much here to see other than driving over to Microsoft headquarters in suburban Redmond. Now Microsoft co-founder and computer collector Paul Allen has opened the Living Computer Museum, with displays of vintage machines — all in working order. One of the oldest is a PDP-7 from the 1960s. The size of an office cubicle, the machine has a fraction of the computing power of your cellphone. Allen himself doesn’t hang out at the museum or show visitors around, but he has an appropriate surrogate in Ian King, the museum’s bearded, kilted senior systems engineer. “I’m a collector myself. I have about 30 machines in my basement,” King says.