diff --git a/acsApp/iocsh/ACS_MCB4B.iocsh b/acsApp/iocsh/ACS_MD90.iocsh
similarity index 100%
rename from acsApp/iocsh/ACS_MCB4B.iocsh
rename to acsApp/iocsh/ACS_MD90.iocsh
diff --git a/acsApp/src/MCB4BDriver.cpp b/acsApp/src/MD90Driver.cpp
similarity index 100%
rename from acsApp/src/MCB4BDriver.cpp
rename to acsApp/src/MD90Driver.cpp
diff --git a/acsApp/src/MCB4BDriver.h b/acsApp/src/MD90Driver.h
similarity index 100%
rename from acsApp/src/MCB4BDriver.h
rename to acsApp/src/MD90Driver.h
diff --git a/acsApp/src/devMCB4B.cc b/acsApp/src/devMD90.cc
similarity index 100%
rename from acsApp/src/devMCB4B.cc
rename to acsApp/src/devMD90.cc
diff --git a/acsApp/src/drvMCB4B.cc b/acsApp/src/drvMD90.cc
similarity index 100%
rename from acsApp/src/drvMCB4B.cc
rename to acsApp/src/drvMD90.cc
diff --git a/acsApp/src/drvMCB4B.h b/acsApp/src/drvMD90.h
similarity index 100%
rename from acsApp/src/drvMCB4B.h
rename to acsApp/src/drvMD90.h
diff --git a/iocs/acsIOC/iocBoot/iocAcs/motor.substitutions.mcb4b b/iocs/acsIOC/iocBoot/iocAcs/motor.substitutions.md90
similarity index 100%
rename from iocs/acsIOC/iocBoot/iocAcs/motor.substitutions.mcb4b
rename to iocs/acsIOC/iocBoot/iocAcs/motor.substitutions.md90
diff --git a/iocs/acsIOC/iocBoot/iocAcs/st.cmd.mcb4b b/iocs/acsIOC/iocBoot/iocAcs/st.cmd.md90
similarity index 100%
rename from iocs/acsIOC/iocBoot/iocAcs/st.cmd.mcb4b
rename to iocs/acsIOC/iocBoot/iocAcs/st.cmd.md90