It has a bias because it choose programs that you can install. It's a good category, but it left some applications out. For example GMail, Candycrush, Facebook, ...
Gmail is equivalent to MS Outlook, so I think it's fair to include both.
Candycrush is implicitly considered in a note in the "games" category, I don't know how would be a fair way to count the installable games, flash games, javascript games, android games, Appstore games, ...
Facebook is in another category (can we put it with Webpress or something). It's more a webpage than an application, but the difference is not so big.
To be fair - the installable programs are quite old. C# is probably the best choice for Windows development if someone would care to write a desktop app today...
I would guess that Javascript and COBOL have a fair share of all existing code that is not C, C++ or Java.
Maybe the big five has 85-90% of all code ever written?
Gmail is equivalent to MS Outlook, so I think it's fair to include both.
Candycrush is implicitly considered in a note in the "games" category, I don't know how would be a fair way to count the installable games, flash games, javascript games, android games, Appstore games, ...
Facebook is in another category (can we put it with Webpress or something). It's more a webpage than an application, but the difference is not so big.