Ah... "unique letters". It didn't say that. So, since I didn't catch on, I guess I'm in the robot category (got the right answer accidentally by trial and error)

Thanks for the clue!

[quote="tbwdave"]It took me a while to register for access to this site, because by my count there are more than six letters in Mozilla. When I entered 7 or seven, or 8 or eight (assuming the '?' was to be counted also), I was told I had not answer the test question properly. However, 6 did the job.

Strange. But it let me join, anyway.[/quote]
Not strange when it was about the total unique letters when you are thinking of the combined total.

M o z i l a = 6

It took me a while to register for access to this site, because by my count there are more than six letters in Mozilla. When I entered 7 or seven, or 8 or eight (assuming the '?' was to be counted also), I was told I had not answer the test question properly. However, 6 did the job.

Strange. But it let me join, anyway.