SIMATIC S7, S7-Technology V4.2, option package for STEP 7, license key download, Floating License for 1 user, for parameter assignment and programming of techno- logical user programs class A, executable in Windows XP (32-bit), Windows 7 (32/64-bit), reference hardware: S7-315T, S7-317T, S7-317TF, Microbox 420-T ******************************* Email address required for delivery