I'd be delighted to receive other everyday examples. When you are done looking at this page, check out 45 Additional Examples 1. 3.5 inch diskette cannot be inserted unless diskette is oriented correctly. This is as far as a disk can be inserted upside-down. The beveled corner of the diskette pushes a stop in the disk drive out of the way allowing the diskette to be inserted. This feature, along with the fact that the diskette is not square, prohibit incorrect orientation.
File cabinets can fall over if too many drawers are pulled out.
For some file cabinets, opening one drawer locks all the rest, reducing the chance of the file cabinet tipping. Automobile controls have a mistake-proofing device to insure that the key is in the on position before allowing the driver to shift out of park. The keys cannot be removed until the car is in park. Warning lights alert the driver of potential problems. These devices employ a warning method instead of a control method.