Is it just me (and it may be).....

[Angus]

Then things must be different in some areas of Europe.
But I must admit I only know 7 surveyors, which might not be fully represantative. None of them would even think about buying such a calculator - especially not for university purposes. I found myself thinking why you decided not to include such a feature. Especially if it is so easy to add. Possibly yet less time consuming than doing the poll itself ;-)
Thank you for enlightening me about that.