Over a year ago I posted about the effort to put classic computer science books into the ACM Digital Library. Now you can peruse the ACM Classic book series, including the Macintosh human interface guidelines, Essays in computer science, The elements of programming style, Cryptography and data security (I knew it well in UCSB days), Papert's Mindstorms, The multics system, and others. If you are a Fresno State person you can access the classics here, and if you aren't, you can go here.
The ACM also semi-quietly announced that online publication is primary, with hardcopy "simply a secondary distribution mechanism unbundled from the official publication in the DL" [Digital Library]. You can read the short article here or if you are a Fresno State person, here. The new style bibliographic entry looks like
Demaine, E. D., Iacono, J., and Langerman, S. 2007. Retroactive data structures. ACM Trans. Algor. 3, 2, Article 13 (May 2007), 20 pages. DOI = 10.1145/1240233.1240236.
Note the DOI.