Landscape vs Portrait

[Sylvain Cote]

Before the coming of the blackberry and of the smartphones, most people used their calculators on their desk and used their fingers for typing.
In that usage pattern, portrait or landscape did not have any effect on the typing speed if you knew were the keys were located.

The advent of the blackberry and of the smartphones changed the device usage pattern, peoples used them in their hands and used both thumbs for typing.
In that usage pattern, portrait is a major productivity boost.

Sylvain