Most broken ribs heal on their own within six weeks. Restricting activities and icing the area regularly can help with healing and pain relief.
Many of the most widely used programming languages (such as C++, Delphi, Java, Python etc.) are multi-paradigm programming languages that support object-oriented programming to a greater or lesser degree, typically in combination with imperative, procedural programming.
This is more than simply listing that one library requires the services of another: in a true OOP system, the libraries themselves may not be known at compile time, and vary from system to system. At the same time many developers worked on the idea of multi-tier programs, in which a display running on a desktop computer would use the services of a mainframe or minicomputer for data storage or processing.