document updated 8 years ago, on Oct 9, 2015
Articles where the main photo was created by me:
https://en.wikipedia.org/wiki/Mississippi_River_Delta
https://en.wikipedia.org/wiki/Bow_drill
https://en.wikipedia.org/wiki/Gridlock
https://en.wikipedia.org/wiki/On-screen_display
https://en.wikipedia.org/wiki/Stall_(fluid_mechanics)#Formal_definition
https://en.wikipedia.org/wiki/Erotic_electrostimulation
https://en.wikipedia.org/wiki/Custard
https://en.wikipedia.org/wiki/Fillet_(mechanics)
https://en.wikipedia.org/wiki/Fire_door
https://en.wikipedia.org/wiki/Ice_racing
https://en.wikipedia.org/wiki/JPEG#Entropy_coding
https://en.wikipedia.org/wiki/Auto_mechanic
Articles where the main photo was found by me:
https://en.wikipedia.org/wiki/Crankshaft
https://en.wikipedia.org/wiki/Center_console_(automobile)
https://en.wikipedia.org/wiki/Food_coloring
https://en.wikipedia.org/wiki/Baker (2nd picture)
https://en.wikipedia.org/wiki/Reaction_control_system
https://en.wikipedia.org/wiki/Aileron (2nd picture)
https://en.wikipedia.org/wiki/Satellite_constellation
https://en.wikipedia.org/wiki/Chart_recorder
https://en.wikipedia.org/wiki/M829
https://en.wikipedia.org/wiki/AeroVironment_RQ-11_Raven
https://en.wikipedia.org/wiki/Taps