Any device or object used to halt the motion of a door, as a large or heavy object, a wedge, or some piece of hardware fixed to the floor, door or wall
A door stop is the small piece of wood, usually 1 3/8" - 1 1/2" wide, that is attached to the door jambs on both sides and on top of the door This strip of wood is where the door comes to rest when it is closed It stops the door from moving any further, and also covers the gap that would otherwise appear between the door and the jambs
A computer that is no longer considered fast enough or to contain insufficient storage, etc for use in normal work All 286's and 386's are doorstops Most 486's are now doorstops Soon we'll see Pentium doorstops