The symbolic architecture of Mathematica notebooks allows immediate interoperability with a wide range of document, web, graphics, and other formats. Mathematica automatically performs Copy/Paste and Open/Save conversions, as well as providing full programmatic access to hundreds of import/export formats.
Copy As — copy from a notebook in formatted form, plain text form (Shift+Ctrl+C), etc.
Paste — automatically paste from many external formats, offering automatic conversions
Print — print to a printer or a PDF file
Print Selection (Ctrl+Shift+P) — print a selection from within a notebook
Send To — send a notebook as email
Open — open a wide range of file types as notebooks
Save As (Ctrl+Shift+S) — save a whole notebook in HTML, PDF, or many other formats
SaveSelectionAs — save an individual graphic or other selection in any standard format