%0 Journal Article %T Lectures on Heterotic-Type I Duality %A I. Antoniadis %A H. Partouche %A T. R. Taylor %J Physics %D 1997 %I arXiv %R 10.1016/S0920-5632(98)00114-5 %X We present a review of heterotic-type I string duality. In particular, we discuss the effective field theory of six- and four-dimensional compactifications with N>1 supersymmetries. We then describe various duality tests by comparing gauge couplings, N=2 prepotentials, as well as higher-derivative F-terms. Based on invited lectures delivered at: 33rd Karpacz Winter School of Theoretical Physics ``Duality, Strings and Fields,'' Przesieka, Poland, 13 - 22 February 1997; Trieste Conference on Duality Symmetries in String Theory, Trieste, Italy, 1 - 4 April 1997; Cargese Summer School ``Strings, Branes and Dualities,'' Cargese, France, 26 May - 14 June 1997. %U http://arxiv.org/abs/hep-th/9706211v1