A marked tendency to right-handedness seems evident in modern technology - for example, the shutter button on cameras is always on the right, while espresso machines always have the steam injector on the right.

I was wondering if the direction of particular types of writing is a clue to whether the people inventing them were left- or right-handed.  For example, were the R>L Hebrew and Arabic scripts more likely to be invented by left-handers, and did the L>R Roman/Greek scripts come from right-handers?

I've no idea if Chinese or other oriental scripts (especially when written in columns) exhibit 'handedness', but I'd be interested to know.