Puzzle

level 16 - pixaranimationstudios
level 17 - bluraydisc
level 18 - stack
level 19 -hamlet
level 20 -ibmwatson
pls help with lvl 21

hey what's Level 12 New i can tell till Level 15:
Level 00 - fortytwo
Level 01 - catullbq
Level 02 - uncyclopedia
Level 03 - wolframalpha
Level 04 - ibm -> Changed
Level 05 - goto -> Changed
Level 06 - andersenconsulting
Level 07 - mozillacorporation
Level 08 - charon -> Changed
Level 09 - googledoodle
Level 10 - sudo
Level 11 - webkit
Level 12 - solongandthanksforallthefish -> Changed
Level 13 - stickykeys
Level 14 - miseenabyme
Level 15 - dragosteadintei