Bringing your own device to work is not totally new. Many employees have been using their own devices, which they themselves purchased, for years. Many companies run software to check a user's computer before the user is permitted to connect to a corporate network. The growth of the home office changed the rules of corporate computing. IBM's policies provide a good example of how home offices can be integrated into the modern workplace; many of the authors of this book have not had a dedicated office space for years. Some companies will allow users to connect with an employee-owned computer from their home, while others will allow only a corporate computer to connect to a corporate network.
One very important point to understand is that the use of BYOD can be different from company to company and also can be impacted via various government rules.