Rule of Three.
Neuroscientists have found that humans can only consume three or four chunks of information in short term memory. It’s uncanny but Jobs divides products, ideas and messages into three parts and he does so in every presentation. Here are some examples from the iPad presentation:
Apple gets its revenue from three product lines; iPhones, iPods and Macs.
Apple has three competitors in the mobile devices category: Nokia, Samsung and Sony.
Netbooks have three problems: Slow, low-quality displays, and run clunky PC software.
