Apple's first logo:

It is a pattern of Newton sitting under an apple tree reading, with streamers wrapped around it and the words Apple Computer Co. written on it.

Apple’s second logo:

An apple pattern surrounded by a rainbow. Apple has been using this logo from 1976 to 1999.

Apple’s third logo Logo:

In 1998, Apple changed its logo again, replacing the original colorful apple with a translucent, metallic silver-gray logo.

Apple’s fourth logo:

The Apple that appears every time you turn on the phone has changed from a strong metallic design to a glass-effect Apple.

The picture below is: Fibonacci sequence in Apple logo