September 2021 - Vol. 64 No. 9

September 2021 CACM cover


Opinion Letters to the Editor

Turing Reaction

The June 2021 Communications of the ACM celebrates Jeffrey Ullman and Alfred Aho as winners of ACM's 2020 Turing Award. For many Iranian members of the computing community, Ullman is the face of discrimination in academia.
Research and Advances Contributed articles

The Future Is Big Graphs: A Community View on Graph Processing Systems

Ensuring the success of big graph processing for the next decade and beyond.
Research and Advances Contributed articles

Formalizing and Guaranteeing Human-Robot Interaction

As robots begin to interact closely with humans, we need to build systems worthy of trust regarding the safety and quality of the interaction.

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