OfficeSAP. JDE, OracleLanguageWINDOWSOperatingSystemCASEOEDB2DOS, UNIX,WINDOWSNTSys. Deveor1caeGeneralApplicationsPowerBuilder用友SpecialApplicationOperating System DOS, UNIX, WINDOWS NT WINDOWS OE Oracle DB2 General Applications Office Sys. Deve. Language Power Builder Special Application SAP, JDE, Oracle 用友 CASE