Understanding NAT Terminologies.

http://astorinonetworks.com/2011/08/16/the-inside-outside-of-nat-for-overlapping-networks/

Also read Keith Barker’s post at http://cln-cisco-elearning-production-vm.hosted.jivesoftware.com/thread/30767

As Aliou said…

nice post indeed, thanks Joe. I found my way to scratch it on my mind:
inside local: how i see myself
inside global: how others see me
outside local: how i see others
outside global: how others see themselves
—-
local: its about me how I see
global: it’s about others how they see
inside: me
outside: others