Z:gnu-www-ja-free-open-overlap--c5c9b2-=26ldquo;O=26rdquo; stands for =26ld/en

&ldquo;O&rdquo; stands for &ldquo;other&rdquo; and refers to programs whose source is under licenses which are open source but not free. Several such licenses were written around 2000, and they were used to release some programs. It has been a long time since we heard of software released under those licenses. We don't know whether they are still used.