Apple CEO Tim Cook has written a special memo to employees celebrating the company's 50th anniversary. The memo reflects on the humble beginnings of Apple and its growth, and the opportunities in the future. Despite not revealing any hints of future products or services, Cook offers a vague look at "opportunities ahead". The company's ethos, which started in 1976, has been a key part of its success and led to the creation of 2.5 billion active Apple devices worldwide. The company has been recognized for its profound impact on the world, with employees expressing pride in their work.