Linux Logo (1996)
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https://www.ibiblio.org/pub/Linux/logos/platypus/llogo.gif
I think the idea was that platypuses give the idea of being put together by disparate parts. Once the cute penguin showed up on the scene it quickly took over however.
Once retired, the platypus was handed down to the Darwin people of course, to go with their Frankenstein NEXTSTEP/Mach/BSD kernel.
I love beautifully engineered software that's represented by a whimsical cartoon character or other non-vector-perfect hand-drawn art.
As in the old Walnut Creek CD-ROM releases:
I got an avatar made in the style (male though).
He was bitten when on Philip Island. You can't get that close to the penguins anymore.
https://www.phillipislandpoint.com.au/attractions/phillip-is...
https://stkildapenguins.com.au/skp/?page_id=93
Also you can find them on the north coast of Tasmania, commonly sitting alongside boardwalks etc.
Fortunately, only about 8 or 9 show. 96 would fill up the screen.
(I had trouble on some new hardware with the usual automated install, so I watched what was happening.)
When you compare Red Hat's hat logo vs Linux's penguin... you can't really have a hat do as much as a penguin. A penguin can smile, and pose, and do things, where a hat can only sit there doing nothing.
Once the Penguin was settled on as the logo, it really went everywhere.