The Internet Archive discovers and captures web pages through many different web crawls.
At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the Wayback Machine.
Treats individual objects and compositions of objects in the same way.
Example:
An example from life is a computer file system. In a directory there might
be other files and directories again. Operations such as deleting or copying can be done
on individual files as well as on directories.
