Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE stock (Carrier VARCHAR, Device_ID VARCHAR); CREATE TABLE device (Carrier VARCHAR, Device_ID VARCHAR)
### Question:
List the carriers of devices that have no devices in stock.
### Answer:
SELECT Carrier FROM device WHERE NOT Device_ID IN (SELECT Device_ID FROM stock)