The original Apple Computer logo (pic 1), depicting Isaac Newton sitting below an apple tree. The logo was designed by Apple co-founder Ronald Wayne. This logo was only used for one year (1976-77).
In 1977 it was replaced by the "rainbow" logo (pic 2), which was in use for 21 years. This logo, famously, became the subject of a long-running trademark dispute with the Beatles who also used an apple logo. The lawsuit was settled in 2007.

