When was the Association for Computing Machinery (ACM) founded?

Question

Please include your reference. Thank you.

Answer 1

From their web site:  ?The Association for Computing Machinery was founded as the Eastern Association for Computing Machinery at a meeting at Columbia University in New York on September 15, 1947. Its creation was the logical outgrowth of increasing interest in computers as evidenced by several events, including a January 1947 symposium at Harvard University on large-scale digital calculating machinery; the six-meeting series in 1946-47 on digital and analog computing machinery conducted by the New York Chapter of the American Institute of Electrical Engineers; and the six-meeting series in March and April 1947, on electronic computing machinery conducted by the Department of Electrical Engineering at Massachusetts Institute of Technology. In January 1948, the word "Eastern" was dropped from the name of the Association. In September 1949, a constitution was instituted by membership approval."

Answer 2

1947