Z:gnu-www-ja-bsd--f323ec-There are many variants of sim/en

There are many variants of simple non-copyleft free software licenses, such as the Expat license, FreeBSD license, X10 license, the X11 license, and the two BSD (Berkeley Software Distribution) licenses. Most of them are equivalent except for details of wording, but the license used for BSD until 1999 had a special problem: the &ldquo;obnoxious BSD advertising clause&rdquo;. It said that every advertisement mentioning the software must include a particular sentence: