[en] This paper summarizes the present status and open problems in electron induced coincidence experiments below pion threshold and indicates future possible developments using high energy continuous electron beams. The recent work on quasi-elastic (e,e'p) reactions is briefly reviewed with some emphasis on electrodisintegration of few-body systems. The use of (e,e'p), (e,e'd), (e,e'2N) reactions to study two-nucleon correlations is discussed. Quasi-elastic (e,e'N) experiments to investigate possible modifications of nucleon electromagnetic properties in nuclear medium are described