Limited
Liability
Company
Many small companies would incorporate to avoid liability to the owners. In other words, if someone sued the company, the assets of the stockholders are safe from liability.
Back in the 90's (I think) it became possible to register sole proprietorships (single owners) and partners as LLC's, shielding the ownership from liability in case of lawsuit, accomplishing what incorporating alone could do before then.
A corporation, automatically having limited liability, has no need to claim status as an LLC.