Software Industry

The software industry comprises businesses involved in the development, maintenance and publication of computer software. The software industry started in the mid-1970s at the time of the personal computer revolution. The industry also includes software services, such as training and consultancy. The largest and most profitable of software companies are located in the United States. As of 2006, the client software industry is dominated by Microsoft[citation needed]. Software Magazine's 500 list in 2005 shows the total amount of revenue brought in by software companies per locale, with the highest being California due to Silicon Valley and the amount of Fortune 500 software companies residing in that area.