The document contains a list of 11 image URLs linking to various abstract, colorful, and graphic wallpaper images including shapes, patterns, textures and digital artworks. The high-level topic covered is abstract digital images that could be used as desktop wallpapers.

1. http://www.wizcraftng.com/images/slider/1.jpg

2. http://www.wallpapersidol.com/amazing-abstract-wallpapers-hd/3d-abstract-wallpaper/

3. http://www.toxel.com/wp-content/uploads/2008/12/2009calendars4.jpg

4. http://photoshoptutorials.ws/images/stories/sparklingdancephotomanipulation/image_3.png

5. https://flyereducation.files.wordpress.com/2012/12/easelly_visual.jpg

6. http://gravedad.com.mx/blog/wp-content/uploads/2012/01/alter_1.jpg

7. http://1.bp.blogspot.com/25283%2529.jpg

9. http://establishareconnect.org/gra217/files/2012/10/b57930ce01ba6e0c2688a7bdb75080a5.png

10. http://www.cruzine.com/wp-content/uploads/2010/07/023-Best-photo-effects-articles-on-the-web.jpg

11. http://www.desktopwallpapers4.me/abstract/colorful-grunge-shapes-3557/

12. http://www.wchm.ca/wp-content/uploads/2013/03/xerion-nl.jpg

13. http://2.bp.blogspot.com/-sSONTDr7AxU/UMxj1tcEeAI/AAAAAAAAHOo/Vjv7q_rYWng/s1600/free%203d%20wallpapers-2.jpg

16. https://flic.kr/p/9rEiiy