What is alc?

It seems like you might be asking about "ALC," but without additional context, it's not entirely clear what you're referring to, as "ALC" could stand for several different things. Here are a few possibilities:

1. Alcohol (shortened as ALC): Often used informally as a shorthand or abbreviation for alcoholic beverages or alcohol content in these drinks.

2. ALC Schools: An acronym for Area Learning Center, which refers to alternative schools providing additional educational support for students who might not thrive in traditional school settings.

3. ALC (Auckland International Airport Limited): The stock ticker for Auckland International Airport on some stock exchanges.

4. Automatic Level Control (ALC): In audio and radio, this refers to systems that automatically maintain a steady audio signal level, preventing distortion from being too loud or too soft.

5. Army Logistics College (ALC): Institutions that provide education and training in logistics for military personnel.

6. ALC Group: A Japanese multinational corporation involved in a range of businesses, possibly related to automotive or other industries.

Please provide additional context if you were referring to something specific!