Remain Software appoints QSYS - XE Quality Systems as Business Partner. Nieuwegein, The Netherlands – April 11th, 2011– Remain Software, developer of Software Change Management solutions for the IBM Midrange (AS/400, iSeries) market and QSYS – XE Quality Systems, provider of solutions for IT infrastructure, today announced a strategic partnership for the distribution of Remain’s TD/OMS Software Change Management suite.