For other methods of installation please refer to the section Alternative Installation Methods or see the install guide.
The below method outlines how to modify a flash drive putting the Debian installer on it. You will need a flash USB drive that is 256MB or larger.
This might be your first choice since the Acer One does not ship with a CD-ROM drive. One way to install Debian on the Acer Aspire One is to use a flash USB drive. There is additional information on installation of necessary drivers and other optimizations. This page is designed to help with installation of Debian GNU/Linux on the Acer Aspire One Netbook. (it is likely this will improve in later Debian releases)