A Texas judge ruled Tuesday that Microsoft cannot sell one of its flagship products, Word, in the United States because of patent infringement.

Using a new product requires some re-learning. That’s unavoidable. But you rarely have to learn an entirely new set of skills—it’s just that the new stuff sticks out at us. This article is to emphasize the similarities between OpenOffice Writer and Microsoft Office Word; the things you don’t have to re-learn.