Maybe it's time to reorder or even drop this list, most Puppy users that boot from removable media probably use a flash drive. Many don't have an optical drive, and some have one but never use it.
This is inaccurate, an application that sits in a 5 MB SFS that got copied to RAM at boot time causes extra 5 MB of RAM usage even when the application is not running. Different tools count "used" memory differently (without page cache and other reclaimable memory, only RSS, by total mapped pages, ...) so some will agree with this statement and some won't. IMO better remove it.