I am writing this column with a silver fountain pen. I had planned to bang it out on a manual typewriter, but I threw away my old Olivetti a long time ago and don’t know anyone who still has one.

Pen or Olivetti makes no difference: the point is not to write it on a computer. I have just started a 24-hour low-tech vigil to mark the stepping down of Bill Gates, who more than any other human being has made the modern office what it is. I wanted to celebrate his departure from full-time work at Microsoft by reminding myself of what life was like when windows were things that let the light in.