How widely used is/was JSD?
JSP and JSD were widely used in the 1970’s and 1980’s in Great Britain and in Sweden. But outside of those two countries, they were not widely used. Within Britain, JSD techniques were widely used as part of SSADM, which incorporated JSD’s entity/event modeling. There is a lot of information about SSADM on the Web. SSADM was originally developed by John Hall and Keith Robinson of Model Systems, which still supports it.
