A part of Total Revenue which is A type of non-recurring one-off Revenue which are not related to typical primary Business activity.
A typical example are the receivables of gains from selling a Fixed Asset or non-recurring one-off receivables, like gifts or charities.
See also
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Business / Business Administration / Financial Management / Financial Accounting / Profit and Loss (P&L)
[ Total Revenue ][ Operating Revenue (Sales) ]
[ Net Income ][ NOPAT][ Revenue ]