Looking for a chart in a linux presentation

[Mary Anne Matyaz]

Hi all. I recall a powerpoint chart from a few years ago on zSeries Linux
that featured an 18 wheeler truck and
a small car. It said that depending on what you needed to move, the 18
wheeler may be more
efficient. I can't seem to find it anywhere...does anyone recall the
presentation or the chart?
Thanks!
Mary Anne