The following tools accompanying each article are accessible from the Tools For Readers box at the top right of an article page:
Comments
You are welcome to comment on any article, but must first sign in to a new or existing ACM Web Account.
Print
Print a copy of the article.
Share
Send an article to popular bookmarking and social networking sites.
Text Size
Change the size of article text to optimize reading comfort.
Some articles link to Author Profiles and additional information in the ACM Digital Library.
Create a Web Account
If you are an ACM member, Communications subscriber, Digital Library subscriber, or use your institution's subscription, please set up a web account to access premium content and site features. If you are a SIG member or member of the general public, you may set up a web account to comment on free articles and sign up for email alerts.