People really need to read the Forewords in the FJ Tech Manual. They provide a backstory explanation for all the discrepancies between the manual and the series, the use of 20th century equivalents, etc. ....
I keep bringing this up, but no one responds.
A lot of us vintage guys read it back when it was new. I always thought it was a great little backstory for the book. And I know Metryq read it; I'd say it just slipped his mind.