%0 Journal Article %T Inelastic Sum Rules %A C. H. Llewellyn Smith %J Physics %D 1998 %I arXiv %X The history and present status of several sum rules for deep-inelastic lepton scattering are reviewed, with particular attention to the discovery of scaling, partons, quarks and QCD. Two outstanding issues are then discussed in more detail: the singlet (Ellis-Jaffe) nucleon spin sum rule and the Drell-Hearn-Gerasimov-Iddings sum rule. %U http://arxiv.org/abs/hep-ph/9812301v1