English/metric measurement error in the Mars Climate Orbiter

[tonyfoale]

Let's not forget:

Crown (5/-)
Half Crown (2/6d)
Florin (2/-)
Sixpence (6d)
Silver threepence (3d)

Crowns and Florins existed but were only in common use way back.

Threepence, you can do better than that - thruppence please.