site tools & features
The following tools accompanying each article are accessible from the Tools For Readers box at the top right of an article page:
You are welcome to comment on any article, but must first sign in to a new or existing ACM Web Account.
Print a copy of the article.
Send an article to popular bookmarking and social networking sites.
Change the size of article text to optimize reading comfort.
Some articles link to Author Profiles and additional information in the ACM Digital Library.