(1977) are directly based upon it. Univers attracted attention to Frutiger's work outside continental Europe, and he was commissioned by Monotype to create Apollo, their first typeface specifically created for phototypesetting, which was released in 1964. Frutiger In 1961–64, Frutiger created with André Gürtler a sans-serif font named Concorde for news use in regular and bold styles for Parisian printing company Sofratype. Required to create a design clearly different from Univers, the design based on classical capitals with a greater classical influence than Univers, partially influenced by a serif design he had worked on in the interim. The design failed to attract attention and was withdrawn from sale after a few years. In 1970, Frutiger was asked to design signage at the new Charles de Gaulle Airport in the suburb of Paris. The "way-finding-signage" commission brief required a typeface both legible from afar and from an angle. Frutiger decided to adapt Concorde using legibility research as a guide, and titled the new design . In 1974, the Mergenthaler Linotype Company commissioned Frutiger to develop a print version of with improvements such as better spacing, which was released for public use under the name of Frutiger in 1976. Extremely legible at a distance or at small size, Frutiger became hugely influential on the development of future humanist sans-serif typefaces; font designer Erik Spiekermann described it as "the best general typeface ever" while Steve Matteson described it as "the best choice for legibility in pretty much any situation" at small text sizes. Frutiger is an amalgamation of Univers tempered with organic influences of the Gill Sans, a humanist sans-serif typeface by Eric Gill, Edward Johnston's type for the London Transport, and Roger Excoffon's Antique Olive: like Univers it uses a single-story 'g', unlike the double of Gill Sans, and has square dots on the letters, but has a generally humanist design with wide apertures to increase legibility, decided on after legibility research. In the 1970s, Frutiger designed , a wedge-serif design with mild stroke modulation, which has many similarities in basic letter structure to Frutiger, and in overall effect to Albertus. Frutiger's intention was more unusual: to create a design that could be modified by computer, through extreme slanting, morphing or changing stroke width, without seeming as if it had been distorted. Frutiger designed a number of other signage projects in the 1970s. These included an adaptation of Univers for the ,