[threeseed]

Been a while since I worked at Apple but it would likely still be:

- Apple ID

- Apple Online Store

- App Store

- Bug Reporter/Radar

- iCloud Apps e.g. Mail.

- iTunes Connect

- iTunes Store

- WWDC

Pretty much all of the internal apps will be in Java unless they are using off the shelf software e.g. discussions. In addition you would have all of the companies they acquired and whatever tech stacks they use e.g. Siri.