Basically parodies of the O'Reilly Media "animal books" that almost always cover some technical, computer-related topic and feature a distinctive woodcut of an animal on the front. I'm hesitant to make a page about this for multiple reasons (mainly because it seems to be limited to sysadmin and programming groups) but a few of them are spiraling out of control:
The Weekly Meme Roundup: DOGE Doubt, Gary Barlow's Big Boy, I Understand It Now and More