Later twentieth century examples include faces such as the condensed members of big, conceptual families like Eurostile, Folio, and Univers. They can be seen as Emigre's first steps in the direction of Solex, though they were both based on earlier bitmap fonts, not on metal typefaces, per se. The specific source of inspiration for Solex dates from the 1950s. Topic, however, bears little resemblance to other members of the Futura family. Futura is a sans serif typeface series of classical, yet geometric, proportions and widths.
Topic is a design that has characters of relatively even widths.
Renner sought to replace the Roman widths with mechanical looking, static ones. It was an attempt to make his type modern and modular. Tasse is essentially a large set of weight and width variations on the upright version of Bauer Topic. Solex, by comparison, is a font family that includes both roman and italic variants. The added head serifs give Solex a trait often associated with monospaced fonts and typewriter faces, and give the i, l, and x two apiece.