When mail volume is up, why are automatic sorting machines being removed from post offices (”USPS says it can’t offer any guarantee,” Aug. 15)? It took 11 days for me to receive a card from a ...

Snail mail. You may not think much of it these days, but the mail doesn’t stop and it never has. Every type of mail from postcards and letters to large envelopes and packages of all sizes moves every ...

Discover the fascinating process of building a gravity-powered coin sorter from scratch! This DIY project combines woodworking precision with ingenious aluminum engineering to create a fully automatic ...