packageDescription
 com.adobe.photoshop.connectionContains classes related to handling the low level connection with Photoshop. 
 com.adobe.photoshop.dispatchersContains classes that are capable of dispatching events or other data, used in communication with Photoshop. 
 com.adobe.photoshop.eventsContains events pertaining to communication, state management, and errors. 
 com.adobe.photoshop.logContains classes that help with logging, standard output, and error reporting. 
 com.adobe.photoshop.messagesContains messages and support classes. These messages can be dispatched to and received from Photoshop. 
 com.adobe.photoshop.subscriptionsContains classes that allow the API to subscribe, unsubscribe, and otherwise manage the subscriptions that Photoshop supports. (E.g. color changes.) 
 com.adobe.photoshop.toolsContains classes that pertain to the Photoshop tools, such as the paintbrush, move tool, etc. 
 com.adobe.photoshop.utilsContains miscellaneous classes that are useful for both the internal API, and for developers' own Photoshop-related code.