U is for UI UX

So UI is the bit you touch, UX is how it makes you feel... yeah this one gets dirty in a real hurry. We do the usual wander back through the history of human / computer interaction, consider the various challenges faced by UI designers in the modern world, and get a bit star struck by the team at Xerox PARC before descending into the expected level of paranoia and fear when Mike tries to work out if he really wants to drive his computer with his mind.