...as a part of its landmark campaign for its 75th anniversary celebrations, ACM is opening up a large portion of its archives, making the first 50 years of its published records—more than 117,500 documents dating from 1951 to 2000—accessible to the public without a login.
* A paper from the inaugural issue of ACM Transactions on Mathematical Software in 1975: https://dl.acm.org/doi/pdf/10.1145/355626.355636
* The UNIX time-sharing system by Ritchie & Thompson. https://dl.acm.org/doi/10.1145/800009.808045
* A Conversation with Steve Jobs. https://dl.acm.org/doi/pdf/10.1145/63334.63336
Edit: More info -
In January 2020, ACM launched an ambitious five-year plan to transition the Association into an Open Access Publisher. The foundation of that plan is a new model called ACM Open, which asks research institutions around the world to underwrite the costs of publication for their affiliated authors. Over the past two years, nearly 200 research institutions have already signed on to ACM Open and ACM is fast approaching the first major milestone for the transition, when approximately 20% of ACM's newly published articles are Open Access upon publication in the ACM Digital Library.
Source: https://cacm.acm.org/magazines/2022/5/260362-thanks-for-the-...