Explain briefly the distinction between

Explain briefly the distinction between National Income and Net National Disposable Income.

National Income is the sum total of factor incomes earned by normal residents of a country during the period of one year.
Net National Disposable Income, on the other hand, refers to income of normal residents of a country, which they can actually dispose-off during the year.
Importantly, it includes besides National Income, net of current transfers from rest of the world and Net Indirect Taxes, i.e.
Net National Disposable Income = National Income (NN${{P}_{Fc}}$) + Net Indirect Taxes + Net Current Transfers from Rest of the World