DIN 1451 family (Linotype library) contains 9 fonts.
DIN stands for Deutsche Industrienorm, German Industrial Standard. In 1936, the German Standard Committee settled upon DIN 1451 as the standard font for the areas of technology, traffic, administration, and business. The committee chose a sans serif font because of its legibility and easy-to-write forms. This font was not seen in advertisements and other artistically oriented uses, and there were disagreements about its aesthetic qualities. Nevertheless, this font was seen everywhere on German towns and traffic signs and hence made its way into advertisements because of its ease of recognition.