: This is a file extension for the 7-Zip compressed archive format. It is similar to a .zip or .rar file but often offers much higher compression ratios, meaning it can pack large amounts of data into a smaller file size. Why use the .7z format? Researchers and developers use .7z for several reasons:

Below is a blog post template you can use to explain what this file is, how to open it, and why it is used. Understanding Aus.7z: What It Is and How to Use It

"Aus.7z" is a specific compressed archive file, most notably identified as part of the hosted on Zenodo , where "AUS" typically stands for Australia.