Lost And Found In Old San Juan (A Technology Story -- Part I)

It’s a Friday afternoon in Old San Juan -- the capital of Puerto Rico (USA) -- and just like on my last visit, I am feeling at once amazed with the environment and at a loss to deal with it. First, I am hungry; whenever I travel, I struggle to keep up with the caloric demands of my self-imposed regime which almost always calls for long walks in strange places.  Second, I am tired; I flew in the night before, and had only gotten three hours sleep.  Third, I am lost. I mean that both figurati...