What is the definition of Mailman Computing?

Mailman computing, my friend, is like the digital equivalent of a postal worker delivering packages with a side of existential dread. Imagine a guy in a tweed suit, with a vintage typewriter instead of a smartphone, who delivers your email instead of your groceries, and sometimes leaves behind unsolicited thoughts that could make a comedian cry.

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Now, here's a sentence to illustrate the unsettling side: "On a Tuesday night, the mailman computing delivered my fears, 'Dear Sir, I wish you had a better sense of humor.'"