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 was adobe's first big customer . Apple invested in Adobe and owned around 20% of the company for many years and had their divergence for many other years when Apple had its near-to-death experience.Today the two companies still work together to serve their jointcreative customers – Mac users buy around half of Adobe’s Creative Suite products ... See more

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.

Steve Jobs stated the opposite in this memo, " Adobe’s Flash products are 100% proprietary. They are only available from Adobe, and Adobe has sole authority as to their future enhancement, pricing, etc. While Adobe’s Flash products are widely available, this does not mean they are open, since they are controlled entirely by Adobe and available only... See more

Jobs was very direct and blunt and finished his memo as follows: " New open standards created in the mobile era, such as HTML5, will win on mobile devices (and PCs too). Perhaps Adobe should focus more on creating great HTML5 tools for the future, and less on criticizing Apple for leaving the past behind."

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

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

Video Games - Apple devices could not play Flash games.

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