Not technically an internal memo but shared here because:A) it's Steve Jobs andB) it's one of the best pieces of business writing I've seen.

Video Games - Apple devices could not play Flash games.

One of the goals of Steve Jobs with this memo was to jot down some of their thoughts on Adobe’s Flash products so thatcustomers and critics may better understand why they do not allow Flash on iPhones, iPods, and iPads.

Apple has many proprietary products too. Though the operating system for the iPhone, iPod, and iPad is proprietary, we strongly believe that all standards pertaining to the web should be open. Rather than use Flash, Apple has adopted HTML5, CSS and JavaScript – all open standards."

Another point for Jobs was that " Flash was a cross-platform development tool. It is not Adobe’s goal to help developers write the best iPhone, iPod, and iPad apps. It is their goal to help developers write cross-platform apps. And Adobe has been painfully slow to adopt enhancements to Apple’s platforms."

Other issues were: Battery power - When using Flash battery power drains faster as opposed to other more efficient technologies such as H.264.

Security - Flash did not have the best security record at the time in order for apple to add it to its devices.

Adobe claimed to have an open ecosystem and blame Apple's closed ecosystem on the lack of Flash access.

Flash design for PCs with Mice, not devices used with fingers.