Zoology is comprised of numerous categories, known as sub-disciplines. For instance, primatology is the study of primates, entomology is the study of insects, ichthyology is the study of fish and ornithology is the study of birds.
A public accountant works for a public accounting firm that performs auditing, tax, consulting and accounting services for other businesses, organizations or individuals.
The GAAP applies to all of the financial statements issued by companies to the general public, so that investors understand how the company is reporting its income and expenses. Private companies, on the other hand, who aren't issuing public statements, can use their own accounting systems.