If you want to make your facility as secure as it can possibly be, you will need to implement a high quality, high-tech access control solution. Whether your facility is small with only one or two entrances or your facility is an entire skyscraper, you need to have complete control over who enters which doors in your building. Computer controlled card access is the most logical solution for controlling who has access to which parts of your building. A good piece of software integrated with each card reader on the doors in your building can provide you with unparalleled access control that will extend not only to your company's employees, but also to guests to your building. Such a computer-controlled system can perform tasks such as locking out all access to a particular room or locking out access to all rooms at once with a single click of your mouse.