This strip appeared in issue #24 of Linux Voice magazine, which went to print shortly after The MagPi had released issue #40 of their magazine – the one which included a free Raspberry Pi Zero computer on the cover!

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↓ Transcript
[Panel 1: Elvie is holding a copy of issue #40 of The MagPi]
Elvie: The Raspberry Pi Zero isn't the first computer to be given away with a magazine…

[Panel 2: Elvie is dragging a copy of "Unix Magazine" dated June 1982. It's taller than she is, and includes a "Free Mini Computer"]
Elvie: but at least it fits through a letter box!