http://www.computer.org/cms/Computer.org/ComputingNow/homepage/2010/0110/W_SW_PairProgramming.pdf
As a dictionary defnition, I’d say that pair programming is a technique in which two people sit down, literally side by side, and write a pro-gram at the same computer. When Kent Beck originally coined the term, he described two programmers working at different levels of abstraction Laurie Williams and Robert Kessler made this idea more concrete, using the metaphor of one programmer being the “driver” and the other the “navigator.” In this metaphor, the driver controls the keyboard and focuses on the immediate task of coding, and the navigator acts as a reviewer, observing and thinking about more strategic architectural issues.
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