Built-in Mathematica Symbol

DumpSave

DumpSave["file.mx", symbol]
writes definitions associated with a symbol to a file in internal Mathematica format.

DumpSave["file.mx", "context`"]
writes out definitions associated with all symbols in the specified context.

DumpSave["file.mx", {object₁, object₂, ...}]
writes out definitions for several symbols or contexts.

DumpSave["package`", objects]
chooses the name of the output file based on the computer system used.

DumpSave writes out definitions in a binary format that is optimized for input by Mathematica.

Files written by DumpSave can only be read on the same type of computer system on which they were written.

DumpSave["package`", ...] writes a file with a names such as package.mx/(value of $SystemID)/package.mx.

You can use DumpSave["file", "s"] to write out the definition for the value of a symbol s itself.

You can typically read a dump file when you start Mathematica by using the initfile command-line option.

Save all definitions for a function in a binary file:

Set the directory to a place for temporary files:

Save all definitions for f:

Clear definitions for f:

Restore the definitions for f from the file:

Reset to the original directory: