Activities can open other activities. Each opened Activity is put on top of the opener. This stack is called BackStack in Android. You can navigate to the previous Activity by pressing the device's back button.

Mutagen is a Python module to handle audio metadata.

In ASP.NET MVC the URLHelper provides a method called Action that generates a fully qualified URL to an action method by using the specified action name, controller name, route values, and protocol to use.

SWTBot is an open-source Java based UI/functional testing tool for testing SWT and Eclipse based applications.

QSlider is a Qt class that represents a vertical or horizontal slider.

The NSFileHandle class is an object-oriented wrapper for a file descriptor. You use file handle objects to access data associated with files, sockets, pipes, and devices. For files, you can read, write, and seek within the file. For sockets, pipes, and devices, you can use a file handle object to monitor the device and process data asynchronously.

expr IN (value,...) --> Returns 1 if expr is equal to any of the values in the IN list, else returns 0.

comtypes is a lightweight Python COM package, based on the ctypes FFI library.

The Python `EOFError` exception.

The main purpose of Spy++ is to log messages that are being passed around in Windows.