Without having to analyze the actual transistor design of the amplifier, you can readily discern the whole circuit’s function: to take an input signal (Vin), amplify it, and drive a load resistance (Rload). To complete the above schematic, it would be good to specify the gains of that amplifier (AV, AI, AP) and the Q (bias) point for any needed mathematical analysis.
If it is necessary for an amplifier to be able to output true AC voltage (reversing polarity) to the load, a split DC power supply may be used, whereby the ground point is electrically “centered” between +V and -V. Sometimes the split power supply configuration is referred to as a dual power supply.