https://www.cs.cmu.edu/~crary/819-f09/Landin66.pdf https://www.cs.cmu.edu/~crary/819-f09/Landin66.pdf First mention of "Functional Programming" is in the paper,

https://www.cs.cmu.edu/~crary/819-f09/Landin66.pdf https://www.cs.cmu.edu/~crary/819-f09/Landin66.pdf First mention of "Functional Programming" is in the paper, "The next 700 Languages" from July 1965. It's heavily implied that FP is programming with things that resemble mathematical objects and have the above properties, not merely just programming with "functions" so to speak. https://youtu.be/1_Eg8KYq2iQ?t=1230 https://youtu.be/1_Eg8KYq2iQ?t=1230 <- Great talk on what FP programming style is.