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 web_client_accelerator (Operating_system VARCHAR)
### Question:
Find the number of web accelerators used for each Operating system.
### Answer:
SELECT Operating_system, COUNT(*) FROM web_client_accelerator GROUP BY Operating_system