Typography nerds, rejoice! In a locker, underneath some old gym clothes, in the NY office of design firm Pentagram lay a dusty old manual. But, Pentagram employees Nike Skourtis, Jesse Reed and Hamish Smyth realized that this wasn’t just an aging tome but rather a first edition of New York City Transit Authority Graphic Standards manual. They then decided to put all 182 pages online.

The 1970s manual, designed by Massimo Vignelli and Bob Noorda of Unimark, includes all the typefaces, signage and official color design that New Yorkers have come to know so well.

You can see some pages below, and peruse the whole manual here.

New York City Transit Authority Graphic Standards manual