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Mathematica > Systems Interfaces & Deployment > Mathematica Sessions >
Mathematica > Notebooks and Documents > Notebook Basics > Managing Computations in Notebooks >
Mathematica Session History
The history of an interactive Mathematica computation is both maintained in a fully editable Mathematica notebook, and is stored symbolically in a sequence of In and Out objects that can immediately be used in other Mathematica commands.
Out (%, %%, %n, ...) — output expressions
In unevaluated input expressions
InString original input strings
MessageList messages produced while generating each output
    
Ctrl+L copy down an input line (InsertInput from Above)
Ctrl+Shift+L copy down an output line (InsertOutput from Above)
    
InputForm show output, graphics, etc. in input form
    
$Line resettable current line number
$HistoryLength number of previous outputs to keep
$OutputSizeLimit maximum size of output to give explicitly
    
CellNotebook History summarize the editing history of a notebook
Saving Session History Information
Save save definitions for symbols, functions or contexts
Put, PutAppend save Mathematica expressions
File Save
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