Do we have to register on the site to get download access? I found something from 1963 I'd like to download but there's no download link[0]. I'm sure I must be making a mistake. I found the article through the dl.acm.org search engine.
That's not published in an ACM venue, but that page has a link with the DOI, https://doi.org/10.1147/rd.24.0289, that takes you to the IEEE page with a download link.
I appreciate you including the DOI link in your comment. I like the fact that ACM has released some articles but as someone not entirely familiar with all the different ACM publications I am unsure as to how to sufficiently limit my search query to find downloadable articles. Perhaps they will add a specific "open access" filter to their search (I unsuccessfully tried searching "open access" but perhaps none of the articles are indexed by their availability). Thank you very much.
[0] https://dl.acm.org/doi/10.1147/rd.24.0289