Apple is expected to reveal a dip in profits today for the first time in a decade. It is because of a slowdown in sales of the iPhone and suggestions the company has lost crucial ground to rivals such as Samsung.
Apple has come a long way since the company was formed in 1976. Here are some key dates in its long history.
Second quarter profits for the company were down £1.38 billion from the same time last year, and the next 12 months will be crucial.
Technology writer Tom Chatfield says Apple risks losing pace with the marketplaces it once defined.