Thoughts on Flash is an open letter published by Steve Jobs, co-founder and then-chief executive officer of Apple Inc., on April 29, 2010. The letter criticized Adobe Systems' Flash platform and outlined reasons why the technology would not be allowed on the company's iOS hardware products, specifically iPhone, iPod Touch, and iPad. The letter drew immediate attention, with Adobe's CEO Shantanu Narayen firing back at Apple, stating that one of the issues in the criticism was due to Apple's own operating system rather than Flash technology, and other criticism was false. At the time, various media publications had different opinions on the topic, with some citing business motivations rather than technological, hypocrisy in the letter despite agreeing with Jobs, and outright accusations of lying. However, retroactively, more publications have agreed with Jobs[1], with notable mentions[2] of poor performance of Flash on Android devices.

(From Wikipedia)