Although my title hasn’t changed in 9 years, my job has changed rather dramatically over the years.
Someone asked me at a wedding the other day, what it is exactly that I do. If it’s someone in the computer industry I usually just say, "Systems Engineer" since most people in this field know what that is. If it’s a lay person however, I usually go through the machinations of describing how Microsoft has a hundreds of products and how the combination of them create what people know today as the 800FLOWERS.COM e-commerce site or how it is that their "Outlook Email" works and what it takes to get that set up in companies.
This time, I simply showed him this on my PDA. It was a lot quicker.
Kurt's Thoughts 
Very well illustrated chart here. …"Good grief"…."Reality check"