This Silicon Valley lab is the brains behind most of the tech innovations of the last 50 years

A little-known lab in Menlo Park, California is responsible for many of the most exciting technologies we've seen over the last half-century.

Initially founded in 1946 by Stanford University as The Stanford Research Institute, it's now separate from the university and goes by SRI International.

But it's always been a non-profit dedicated to research and development.

With $4 to its credit, SRI is fairly well-known in Silicon Valley, but most consumers have no idea $4 helping with everything from the computer mouse to the Siri voice assistant in your iPhone.