The Massively Parallel Processor sits along a wall at the Steven F. Udvar-Hazy Center. It is not much to look at, but it does have a remarkable story to tell us about computing history. In this week's Ask an Expert Live, space history curator Paul Ceruzzi will reintroduce us to this fascinating machine and its history.

Tune in on Facebook Live.

Planning to attend in-person? Meet at the back of the McDonnell Space Hangar.

Every Wednesday at 12:30 p.m. we will go live on one of the National Air and Space Museum Facebook pages with an Ask an Expert talk. We’ll select a different aviation or space topic each week, and a Museum staff member will discuss the history, stories, or personalities related to a specific artifact or exhibition in the Museum. Tune in on Facebook Live each week to join the talk and ask our experts questions.