The technical meaning of VR  is  virtual reality

The technical meaning of VRMMO is  virtual reality massive multiplayer online

The technical meaning of RGB is red, green, blue

The technical meaning of HPU  is  holographic processing unit

The technical meaning of IMU  is  inertial measuring unit

The technical meaning of IoT  is  internet of things

The technical meaning of AR is  augmented reality

The technical meaning of IPD  is  interpupillary distance

The technical meaning of DOF  is  degrees of freedom

The technical meaning of IR is infrared