The first volume lists approximately 55,000 companies. Each entry lists officers, line of business, SIC codes, sales, number of employees, major bank, along with division names and functions.
Subsidiary listings are separate with reference to parent companies.
Volume 2 contains brief biographical data on executives and volume 3 contains a geographical index and a SIC index. The Hoover's series of publications gives an historical overview of companies along with a financial snapshot. Additionally, also lists key officers and key competitors of the company being profiled. The series is concise, easy to read and are a good place to start researching a company. Company lists and in-depth company profiles are available via this service.