listen to, read, and look at visuals from this awesome podcast from 99% invisible. it features tom geismar, a founding partner of chermayeff & geismar & haviv. it discusses the qualities of a distinctive brand mark and how meaning is formed over time around a symbol. chermayeff & geismar & haviv have designed identities for mobil oil, pbs, and national geographic, among many others. a great episode of a great podcast!