Contributor muecker

7-Zip is open source software. Source code is under the GNU LGPL license. it is nice to install it default.

1. Install 7zip with other copression methodes like zip, tar, gzip

2. It automatically integrated with file-roller. So no need any other gui program or user don't want to know complex comand lines for compressing their data in 7zip.

Most of the planet uses the Metric System. So why does the system default to imperial units? Make A4 the default paper size for printing, only two countries don't use it. Most people don't know what inches are so cm or mm should be the default.