Dot-Dash-Dot or was that Dot-Dash-Dash?

Apparently spelling is not all that fundamental, especially if you're doing it in Morse Code.

There is a Pittsburgh landmark, the Grant Building, that since 1929 has used Morse Code on its beacon to spell out Pittsburgh. At least that was what everyone thought. According to Scott Carmichael on Gadling, a travel blog, for 80 years it's been spelling out something else.