Analysis of information sources in references of the Wikipedia article "Commercial software" in English language version.
Rather than offer hardware, services and software exclusively in packages, marketers unbundled the components and offered them for sale individually. Unbundling gave birth to the multibillion-dollar software and services industries, of which IBM is today a world leader
So if open source used to be the norm back in the 1960s and 1970s, how did this _change_? Where did proprietary software come from, and when, and how? How did Richard Stallman's little utopia at the MIT AI lab crumble and force him out into the wilderness to try to rebuild it? Two things changed in the early-1980s: the exponentially growing installed base of microcomputer hardware reached critical mass around 1980, and a legal decision altered copyright law to cover binaries in 1983. Increasing volume: The microprocessor creates millions of identical computers
Rather than offer hardware, services and software exclusively in packages, marketers unbundled the components and offered them for sale individually. Unbundling gave birth to the multibillion-dollar software and services industries, of which IBM is today a world leader
