Lydian is a typeface designed by Warren Chappell for American Type Founders in 1938. While the twisted letter designs (most notably in the rounded capitals C, G, O, and Q) suggest a calligraphic style, this is considered a sans-serif font. It is available in bold, italic, and condensed, as well as a Cursive variant.

Of or pertaining to Lydia, a country of Asia Minor, or to its inhabitants; hence, soft; effeminate; -- said especially of one of the ancient Greek modes or keys, the music in which was of a soft, pathetic, or voluptuous character.

a major mode

The authentic mode which begins on the F note in relation to C major.

an Anatolian language

Lydian is a simulation and visualization environment for distributed algorithms that provides to students an experimental environment to test and visualize the behaviour of distributed algorithms.