June 24, 2022 is our 5th virtual class of SEAMEO virtual student exchange 2022 with the topic of ACTUATOR. In my research actuator is a device that produces a motion by converting energy and signals going into the system. In the topic of prof. Moko he discuss the definition of actuator, linear actuator with the example of application of linear of actuator and Rotary actuator ,Electromagnetic actuator with the type of actuator based on energy source .Hydraulic, Pneumatic, Thermal or magnetic, Mechanical also how to choose the right actuator with the example of actuator application in IoT.