The New York Times Director of Copy Desks answers questions about copy editing.

I especially like 1990’s ; ’90s ; 1990s divide. In the font my browser uses this is confusing, because the zero looks very much like a lower case oh. I must say that I tend to use DVD’s not DVDs. I think that this is usually because for the acronyms I deal with on a daily basis, appending an ess would be significant. For example, ACE’s and ACEs’s need to be differentiated. Perhaps I should choose more carefully.