It’s My Father’s 90th Birthday!

Happy Birthday, Dad!

When I was a kid he came home from work with a 16mm projector and a reel of film. “We’re going to watch a movie,” he said.

After dinner he threaded the projector. It was film of him, carrying out an experiment on the quantification of difficulty — while driving a car down Route 128.

When people asked me or my brother what my father did for a living, it was not an easy thing to explain.

It still isn’t.

We’re off to a family get-together with a lot of people celebrating at a Chinese restaurant in Cambridge. It should be fun.