KINGSPORT — Public, private and church schools in Kingsport, across the Tri-Cities and Tennessee have a new mandate: Keep exterior school doors locked or secured with an employee gatekeeper, even for ...

[Will] has been hard at work on a replacement system for his Hackerspace’s RFID door lock. The original is now several years old and he’s decided to upgrade to a much more powerful processor, adding ...

A sliding window or door is one that opens by sliding horizontally along a top and bottom track in the frame. They come in various types and sizes. Julius Mutayi, a civil engineer says sliding doors ...

CHARLOTTE, N.C. — A sliding door — say, a door of planks hanging from exposed hardware — transforms a room. It’s so eye-catching, so unexpected, that it invites closer looks. It brings smiles. There ...