What is a thin, savory, crisp biscuit called?

A cracker is a flat, dry baked food typically made with flour. Flavorings or seasonings, such as salt, herbs, seeds, or cheese, may be added to the dough or sprinkled on top before baking.

The characteristic holes found in many crackers are called "docking" holes. The holes are poked in the dough to stop overly large air pockets from forming in the cracker while baking.

The modern cracker is somewhat similar to nautical ship's biscuits, military hardtack, chacknels, and sacramental bread. Other early versions of the cracker can be found in ancient flatbreads, such as lavash, pita, matzo, flatbrød, and crisp bread. Asian analogues include papadum and senbei.

In American English, the name "cracker" usually refers to savory or salty flat biscuits, whereas the term "cookie" is used for sweet items.