Why, in 1984 I ran CP/M on my laptop.
... Ok, it wasn't mine, it was my fathers.
... It wasn't a laptop either. It was a Kaypro II "portable", which meant it had a handle and weighed less than 15kg.
... And I really had no idea what to do with it.
Nevertheless, it's what got me interested in these things. Here is a picture of a similar machine (sadly I have no pictures of the one we had):
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