Ikarus is a type design and production software developed by URW and Brendel Informatik foundries, for converting existing typefaces and logos into digital format for use on computer driven printing, plotting and sign cutting devices.
It was licensed by major foundries such as Agfa-Compugraphic, Autologic, Berthold, International Typeface Corporation, Letraset, Linotype, Monotype, Stempel, and others.
Its "IK" format was convertible into diverse vendor representations, including Type3 and Type1 PostScript formats as well as the TrueType format by Apple and Microsoft.
Ikarus uses a spline model of the outline shape of each character within a typeface to give a fully scalable representation. The curve segments are essentially circle arcs, with tangent continuity maintained at joins. It is a very simple format to mark up manually. Being a vector/curve based format, any rendering resolution can be attained (by rasterisation) with equal accuracy from one relatively small set of data. The Ikarus coordinates for a shape all fall on the outline of that shape (as opposed to Bézier curves where 'control' points can be inside or outside the outline).
The functionality of Ikarus can be expanded using plug-ins.