[FRC4ME]

Oh yeah, I forgot about labels!

"BACKWARDS"
"until we fix it"
-Two labels, one above the other, on a sensor cable that we had soldered backwards and didn't want to spend the time fixing.

"maybe bad"
-Written on any battery that fails to hold a charge. Or, more accurately, any battery that we think cannot hold a charge because we think its charged when its not and try to use it.

"(really) (really) stupid light"
-Label on the yellow diagnostic light on our robot. Every time we have to spend two hours tearing apart our wiring to fix said nearly useless component, it gets an additional "(really)". We actually refer to this as the Stupid Light in general conversation now, capitalizing and pronouncing it as if that is its proper name.

"this is not a toy"
-Label on the disable dongle after someone broke it by toggling it back and forth all day out of boredom.

"Auto Brake: Arm/Disable"
-Label on a military-style switch on our custom control box, meant to imitate an actual switch found on a Boeing 747. We also have flight simulator joysticks, so this is appropriate.

"magic/more magic"
-XKCD switch labels on our teleop/autonomous switch. We wanted to use "order/chaos", but the programmers and drivers couldn't agree on which mode got which label.