(Strip Number 5072, Original Publication Date, 4 January 1989)
Panel 1: Mike tells Elly that he and Elizabeth have done what she asked and wrote Grandma a real letter.
Panel 2: Elly notices to her alarm that the real letter is the same form letter he wrote to Phil, Georgia and the Cruikshanks. It should be noted at this juncture that either Elly is a real stickler about thank-you letters and probably expects to get one herself OR Lynn has forgotten that Danny and the others were present to watch the presents being rent asunder. The smart money is on the latter because Lynn tends to think that she's writing for Archie Comics.
Panel 3: When he says that he knows this because he wrote'em on the computer, she goes into full-blown panic mode about that being mechanical and impersonal.
Panel 4: When he downplays her fears by saying that they signed them by hand, she's not mollified in the least.
Summary: While it is actually sort of cold to send people a form letter, Elly's reaction is somewhat overblown. We get to see why her dread of computers exists in a sort of Luddite triptych that starts tomorrow.