When it comes to campaign design, using just a letter or two is in. The most memorable letter-as-logo is Barack Obama's "O," but before him, Hubert H. Humphrey (D) used a triple "H" in 1968 ...

Decades after sending it to design purgatory ... to NASA by Mr. Danne and Mr. Blackburn went far beyond just a four-letter logo. They also put together a compendium of dos and don’ts ...