The Legacy Operating System

Over the last year or so, I have received several emails about my use of the term "legacy operating system" on LinuxCommand. Most of these emails express concern over the exact technical meaning of the term. Well, to me, a legacy operating system is any system you are migrating from regardless of its perceived modernity. I use the term to avoid mention of that well-known company in Redmond, Washington and its products. They do a fine job of that on their own and do not require my help.