* A/V: This stands for "audio/visual," and is used when referring to both audio and video components or systems.
* A/D: This stands for "analog-to-digital," referring to the process of converting analog audio signals into digital ones.
* D/A: This stands for "digital-to-analog," referring to the process of converting digital audio signals back into analog ones.
* Audio: This is the most common abbreviation, simply using the first four letters of the word.
* Aud: This is a less common abbreviation, often used in technical contexts.
The best abbreviation to use will depend on the specific context.