| Word | Description |
| A/C Adapter | The A/C adapter is the power connection on the back of the VUDU STB. The power requirements of the VUDU STB are 12v and 2.0A. |
| A/V | Acronym for Audio/Video. |
| Aspect Ratio | Generally, there are 2 types of aspect ratios. Standard 4:3 aspect ratio and widescreen 16:9 aspect ratio. Modern movies are shot at 16:9 ratio. |
| Audiophile | A person who is knowledgeable about audio components. |