Hi John, For the US, you will find that what constituted GNP changed from the 1920's and became the national income estimates of Kuznets in 1941 (see Kuznets; S., 1941, National Income and Its Composition 1919-1938, Vol. 1, New York, NY: National Bureau of Economic Research) which details how Kuznets and the NBER set up the national accounts for the US. This was then superseded by Keynes, Meade and Stone's framework as outlined in the UK white paper of 1941 (and I think GDP is named explicitly there, if memory serves). This eventually became the UN standard national accounting framework. For the exact timing of the terms 'Gross National Product' and 'Gross Domestic Product' I do not have a reference for, but 'national income' is first mentioned as a term in William Petty's 1676 *Political Arithmetic*(see http://webspace.newschool.edu/~kahnb081/MitraKahn-NI05.pdf presented at HES conference 2007 for references and early national accounting) and I think Gregory King used the term 'net national product' as he did distinguish between the net and gross, and had certain terms he used for them. A good history of national accounting would be: Studenski, P., 1958, *The income of Nations: Theory, Measurement, and analysis: Past and Present: A study in Applied Economics and Statistics*, New York, NY: York University Press, but beware of some whiggish tendencies in places. Not sure about the 1992 change in the US, so will leave that for someone else to handle. Best Benjamin Mitra-Kahn