Picture attributions

The window: Castle Burghausen, Public Domain from wikipedia
The apple: CC-BY made by Roberta F. (wikipedia)
Packages: Public Domain Smithsonian collection (Flickr)
Code: cmd.exe CC-BY-SA made by flickr user n3wjack
Lisp machine: CC-BY-SA made by flickr user el benjamin
Toolbox: CC-BY-NC-ND made by flickr user dipster1
Osternest: CC BY-SA by wikimedia author Fornax
Beetle: CC-BY-sa by Patrick Coin
Hipstertrap: http://urbantraps.com
Eggs: CC-BY by flickr user La · De · Da
Coop: CC-BY-SA by flickr user redjar
Salmonella: CC-BY by flickr user Nutloaf
Takeaway: CC-BY-NC-SA by flick user Cian Ginty