Ubuntu 12.04.5 LTS (Precise Pangolin) Alternate install CD i386 iso

The alternate install cd allows you to perform certain specialist installations of Ubuntu. It provides for the following situations:

setting up automated deployments;
upgrading from older installations without network access;
LVM and/or RAID partitioning;
installs on systems with less than about 384MiB of RAM (although note that low-memory systems may not be able to run a full desktop environment reasonably).

PC (Intel x86) alternate install CD
For almost all PCs. This includes most machines with Intel/AMD/etc type processors and almost all computers that run Microsoft Windows, as well as newer Apple Macintosh systems based on Intel processors. Choose this if you are at all unsure.