: Apple is the company that manufactures Mac computers (mac), the iPhone and iPod touch (iphone), and the iPad (ipad), as well as the operating systems for all of those (osx and ios). Apple

Apple is the company that manufactures Mac computers (mac), the iPhone and iPod touch (iphone), and the iPad (ipad), as well as the operating systems for all of those (osx and ios).

Apple seeds pre-release developer tools and operating systems under an NDA. Be careful not to reveal facts about these pre-release versions before they are released, and please do not ask questions about them here. For questions about NDA'd topics, see the Apple Developer Forums.

As it doesn't make sense for your application to target Apple the company, consider using tags more relevant to the OS and device/computer you're targeting, or, for tool-specific questions, to the tool you're using or think about using the Apple Stack Exchange Site for your questions.

Possible tags instead of using apple could be:

Operating systems

macos (Classic Mac OS)
osx (Mac OS X)
ios (iOS)

Hardware

mac
iphone
ipod touch
ipad

Developer tools

xcode (the IDE)
interface-builder (separate application prior to Xcode 4)
instruments
dtrace (used by Instruments as well as usable separately)
shark

Frameworks

Each one exists on both Mac OS X and the iOS unless otherwise noted.

cocoa (Mac OS X)
cocoa-touch (iOS)
foundation (part of both Cocoa and Cocoa Touch)
appkit (Mac OS X; part of Cocoa)
uikit (iOS; part of Cocoa Touch)
core-data (part of both Cocoa and Cocoa Touch)
core-graphics
core-text
core-location
avfoundation (iOS)
mapkit (iOS)
mediaplayer (iOS)
osakit (Mac OS X)
pdfkit (Mac OS X)
imagekit (Mac OS X)
carbon (Mac OS and Mac OS X; parts of it have moved to other frameworks and are available on iOS as well, but Carbon itself is not)
core-foundation (also on Mac OS, where it is part of Carbon)

Languages

Natively supported by Cocoa and Cocoa Touch

(The language bridge used by PyObjC and RubyCocoa does not count as “native” for the purpose of this section.)

c
c++
objective-c
objective-c++
macruby

Other (bundled with Mac OS X)

python (see also pyobjc)
ruby (see also rubycocoa)
applescript

Other topics

app-store