From the early days of modern computing through to the 1970s, it was far more common for computer users to have the freedoms that are provided by an ethic of open sharing and collaboration. Software, including source code, was commonly shared by individuals who used computers. Most companies had a business model based on hardware sales, and provided or bundled the associated software free of charge. According to Levy's account, sharing was the norm and expected within the non-corporate hacker culture. The principle of sharing stemmed from the open atmosphere and informal access to resources at MIT. During the early days of computers and programming, the hackers at MIT would develop a program and share it with other computer users.