the.com/shells
Armor a creature builds, abandons, and eventually leaves on a beach for you.
means Hard protective outer cases, whether grown by mollusks, fired from guns, or scripted into a computer terminal.
from From Old English sciell, meaning a thin protective covering, related to scale and skull — all things that shield soft insides.
Command lineThe shell wraps the kernel, the operating system's soft core.
Cowrie cashShells were money across Africa and Asia for centuries.
Egg engineeringA curved shell distributes pressure like an architectural dome.
Shell gameThe con predates Ancient Greece by no fair margin.