Although the now-retro rainbow logo is arguably Apple’s most well known, the very first Apple logo featured Sir Isaac Newton sitting under a tree, with an apple about to hit his head. (Legend has it that he was literally hit on the head with an apple and that led to the concept of gravity.)

The Newton logo was designed by the lesser-known Apple founder Ronald Wayne (the guy who sold his stake — that today would be worth $22 billion — to Steve Jobs and Steve Wozniak for $800 – ouch!) and was only used briefly in 1976, since its high level of detail didn’t really show up that well when shrunk down and stuck on a product.

The rainbow apple, designed by Rob Janoff, replaced Sir Isaac and remained the symbol of the company for many years until the simpler monochromatic apple logo was introduced in 1998.