Intel co-founder Gordon Moore will speak at the Computer History Museum on September 29.

Moore made a pivotal observation that has guided technical progress in the semiconductor industry for the past 40 years. He will be joined by Carver Mead, the CalTech professor who coined the term Moore's Law.

Moore's Law states that transistor density on integrated circuits would double every year. In 1975, Moore revisited the issue and adjusted the prediction to a doubling every two years.

Moore is expected to return to the theory and to offer an update as to how the present situation has changed, or not changed, his original thought.

Pre-registration is required, though admission is free for members of the Computer History Museum. Non-members must pay $10.