- K -
	K- and KA-probability density functions Kalman filtering Kalman filtering, linear systems Kalman filters	Kdom Kinematics Knowledge based systems Knowledge engineering

- L -
	Lake circulation Lakes LANs Laser applications Laser measurements Laser ray attenuation in water Lasers Lattice filters Layback distance Learning control Learning control systems Learning systems Least squares Least-mean-square methods Least-squares approximation Least-squares methods Least-squares optimization Legal factors Lenses Level crossing Level-crossing problems LF radio propagation Life testing	Light scattering Light-emitting diodes Limit cycles Limnology Linear Linear antenna arrays Linear approximation Linear arrays Linear interpolation Linear prediction Linear-quadratic control Linear-quadratic-Gaussian control Liquid level measurement Lithium materials/devices Loaded scatterers Local-area network (LAN) Localization Long-range propagation Loops Low frequency Low grazing angle Low-frequency projectors Low-frequency propagation Lyapunov methods