On Paper: ADC (Analog to Digital Conversion) ADCH and ADCL Left and Right Adjusted Explained

The ADC allows the data registers (ADCH and ADCL) to be right adjusted or left adjusted. This makes it easier to pull the number out of the data registers (ADCH and ADCL). When left adjusted, its easy to get the 8-bit number from the ADCH since the full 8-bit number is stored in that register. Right adjusted ADCH and ADCL is best for getting the data out of the ADCH and ADCL.