Bureau of Labor Statistics
This is the main source of data on U.S. employment, wages, and trends over time for software as well as for other industries.
The Manta company is a business intelligence company that provides data and information on 63,778.867 companies around the world. Some of the data is sparse but the volume of useful information is large.
Hoovers Guides to Business
The well-known Hoovers Guides provide fairly detailed information about industries and thousands of specific companies. Some of the data included are employment statistics, earnings for public companies, stock exchanges where stocks are traded, and considerably more. Some Hoovers ...