I wrote to the address in the GPLv2 license notice

Dealing with open source software, I regularly encounter many kinds of licenses — MIT, Apache, BSD, GPL being the most prominent — and I’ve taken time out to read them. Of the many, the GNU General Public License (GPL) stands out the most. It reads like a letter to the reader rather than legalese, and feels quite in tune with the spirit of open source and software freedom. Although GPLv3 is the most current version, I commonly encounter software that makes use of GPLv2. I got curious about the last line in its license notice: You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. Why does this license notice have a physical address, and not a URL? After all, even though the full license doesn’t often get included with software, it’s a simple matter to do a search and find the text of the GPLv2. Do people write to this address, and what ... Read full article.