But now that real people have begun to use PCs, software has been bending over backwards to be ingratiating. Besides images of fountain pens, you also have databases presented as filofax pages themselves so trendy only a few short years ago and already so quaint. Windows has transformed the ticking clock face used by the Apple Mac not just into a fob watch or even grandfather clock , but into an hourglass. Elsewhere you might find icons such as a jukebox (not a stereo, note) enabling you to play loud music.

In a few centuries, the archaeologists will probably puzzle over it all. But in the comfort of their high-rise blocks, surrounded by their finest plastic, planning their weekend trip with the kids to Spaghetti Junction, the Bloggs family will look back and think this must have been a golden age.