Many typefaces designed with a pen on paper (especially those from the 20th century) were licensed by different foundries, and were later independently digitized by them. Some special characters such as @ or the euro sign, were independently added later. Those “alternate cuts” are different digital versions of basically the same typeface design. They often vary in character set, letter proportions and kerning. Some are published under different names.
The original Frutiger typeface was designed in the early 1970s by Adrian Frutiger and his studio for the wayfinding system of the Roissy Charles de Gaulle airport in Paris. Soon after the airport was opened, a huge demand for the typeface arose from companies wanting to employ it in other signage systems, as well as in printed matter. The Frutiger typeface came out as part of the Linotype library in 1977. Epitomizing functionality and clarity both in signage and as a bread-and-butter typeface in print, Frutiger became a modern classic.