Drag coefficient

A dimensionless number used in momentum transfer in general and free settling velocities and resistance to flow calculations in particular. Proportional to (Gravitational force) / (Inertial force).

C_D = (g (rho-rho_f) L) / (rho V²)

g: gravitational acceleration, L: characteristic dimension of object, rho: density of object, rho_f: density of surrounding fluid, V: velocity

An term used (unofficially, of course) by corporate human resources departments for the number of outside responsibilities/interests an employee has. The lower the number, the more desirable of an employee you are.

Married? That's a point. Have kids? Another point. A sick parent? Another point. And so on. Anything that might distract you from work is a point. The more points, the higher your drag coefficient, and the less desirable you are to employers.

Yet another reason why there are so few 40-year olds in IT.

Source
http://www.business2.com/articles/mag/0,1640,13224,00.html