Access control Systems or sometimes called card access systems is the heart of controlling who can enter and sometimes leave an area. There are many systems out there that can be used for this purpose and we at KC Security have experience on most them. So, we know which ones to use based on what you would like the system to do for you. Our field technicians and engineering staff have been trained to service and install these systems. We do not consider a system service or installation complete until the customer has agreed we have provided what we said we would.