" The crucial legacy of the personal computer is that anyone can write code for it and give or sell that code to you – and the vendors of the PC and its operating system have no more to say about it than your phone company does about which answering machine you decide to buy. "
- Jonathan Zittrain

The quote discusses a key feature of personal computers: their openness to user-created software. Essentially, it means that people can write programs or applications for personal computers and distribute them freely or sell them to others without interference from the computer’s manufacturers or the creators of its operating system. This is similar to how phone companies have no control over which answering machine a customer chooses to use.

The deeper meaning of this quote emphasizes the power of open platforms in fostering innovation and creativity. By allowing anyone to develop software for personal computers, these devices become more versatile and adaptable to various needs and ideas. Unlike closed systems where the manufacturer or operating system vendor controls what applications can run on their platform, personal computers enable a wide range of solutions from diverse developers. This openness not only encourages technological advancement but also supports competition among software creators, leading to a rich ecosystem with numerous choices for end-users.

Jonathan Zittrain is an American academic and Internet governance expert known for his work in technology law and policy. He is the co-founder of Harvard’s Berkman Klein Center for Internet & Society and holds professorships at both Harvard Law School and Harvard's John A. Paulson School of Engineering and Applied Sciences. His insights often focus on how technological design influences societal impact, making him a respected voice in discussions about internet freedom, privacy, and security.