Just van Rossum is a Dutch type designer and programmer, and together with Erik van Blokland he co-founded LettError, a virtual type foundry. Most of his typefaces are published with FontFont library. He is the developer of the RoboFog (with Petr & Erik van Blokland), precursor of RoboFont font editor, of TTX/FontTools library which is a crucial part of most font editors, and the author of the original version of the DrawBot application for teaching Python scripting in a visual way. Van Rossum studied at the KABK (Royal Academy of Arts) in The Hague, where he is teaching now.
The ultimate Slab Serif capital H, with the number of serifs is ever expanding. Each H grows four serifs. Each serif becomes an H by growing additional serifs on the serifs. And so on.