A family of Microsoft relational database management systems designed for ease of use.
I don't know if I am a developer or knowledge worker - what I do know is that I have written a suite of Access reporting capabilities to give users a simple capability to "pull" KPI graphs (using pivots) at the touch of button.
As the one of the first in our business to move to Access 2013 I have wasted a good deal of our companies time and effort.
Maybe Microsoft developers should become end users for a while.