In May 1956, the new IBM logo was created by the famous graphic designer, Paul Rand. It was a complete redesign from the 1924 version. The logo was replaced by another typeface, known as City Medium, from the earlier Beton Bold typography, boasting a more solid, grounded and balanced look.
In 1972, IBM introduced a new version of the logotype. Also, designed by Paul Rand, horizontal stripes now replaced the solid letters to suggest "speed and dynamism."
Today, IBM has taken a new and colorful approach while still maintaining the original, iconic logo. A team effort by Office and Ogilvy & Mather. I just can't stop starring at them! Gorgeous!