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+Atlc is a finite difference programme that is used to calculate the
+properties of a two-conductor electrical transmission line of
+arbitrary cross section. It is used whenever there are no analytical
+formula known, yet you still require an answer. It can calculate:
+
+ The impedance Zo (in Ohms)
+ The capacitance per unit length (pF/m)
+ The inductance per unit length (nF/m)
+ The velocity of propogation v (m/s)
+ The velocity factor, v/c, which is dimensionless.
+
+A bitmap file (usually with the extension .bmp or .BMP) of the cross
+section of the transmission line is drawn in a graphics package such
+as The Gimp and then analyzed using Atlc.