Also from The Cognitive style of PowerPoint, in the (legendary) section about the Columbia Accident:

Shakiness in conventions for units of measurements should provoke concern.*

[Footnote] *In their final report (p. 191), the Columbia Accident Investigation Board developed this point about units of measurement: "While such inconsistencies might seem minor, in highly technical fields like aerospace engineering a misplaced decimal point or mistaken unit of measurement can easily engender inconsistencies and inaccuracies."