Why when I type 'resistivity' into Word does it assume I've made an error? Why does the annoying little office assistant thing pop up its little lightbulb and suggest a method for 'moving between errors in your document'? It's not my bloody error, it's Microsoft's. It's not as though 'resistivity' is a masssively obscure word - it's used in physics, chemistry, engineering (mechanical and electronic) and geology, to name but a few.