現在，應該會是Flash Player / Acrobat Reader (果然是樹大招風)

先看看2008 的targeted attacks ，就會知道acrobat reader 都差不多已佔有30%。

(Credit:F-Secure)

2009 年的更令人震驚。

(Credit: F-Secure)

差不多已經有50% 都是向著acrobat reader 而做的。

Those scary statistics prompted F-Secure researcher Mikko Hypponen, chief research officer at F-Secure, to urge Adobe Reader users to switch to an alternative PDF reader at the RSA show in April.

叫user要轉alternative pdf reader?….看來adobe pdf 的問題真的愈來愈多了。

“I’d like to think that they would start realizing that they can use security as a selling point, but it took Linux to get Microsoft to do that. They felt they had competition,” he said. “Is there a Linux waiting to affect Adobe?”

上面的文章很有意思，正因為linux 以安全性來做selling point (當然又sell 到人先得la)，迫使window 要patching 方面要做得更快。

但是，對於adobe來說，跟本就可以算是無對手，至少 chowky 不認為silverlight能夠對flash player構成competition。

Source: http://news.zdnet.com/2100-9595_22-329118.html

利用了php + Different Databases ，這是非常common 的opensource 的system 所採用的方案

其實source 中都有提及，所計出的數字只是有report back to moodle的site。還未計一些沒有report 的site。

impressive

另外，這意味什麼?…自己想想吧。

License:  GPL licence

Source: http://minutebio.com/blog/2009/06/12/how-big-is-moodle/

Statistics: http://moodle.org/stats/