Binder is a type of project folder where you can store your search results. You will need an ACM account. See Registration tab.
In the ACM Digital Library you can share an article you have found via Save to Binder (yellow).
If you want to store an article in a binder, you can create a new binder and give it a name.
There are several ways to share your binder:
1. Share by entering an email address (of someone with an ACM account) and clicking Share.
2. Download in BibTex, EndNote or ACM Ref
3. Create a PDF of your binder by clicking on the red button