Primary purpose of this article is to define and discuss on Entrance Gates and Access Control Systems. Entrance gates are basic yet effective accessibility control solutions for businesses. Basically, gates provide safety and security to personnel and assets in just a defined area, while physically barring people devoid of the proper security references. Entrance gates are available in many forms in addition to sizes, from half-height gates to full top variants. They may open up and close in many different ways, such as swing gates, revolving gates, or slipping gates. The resting position of any gate may be operational, closing only within certain triggers; it may be the reverse, opening only under a particular set of sparks. Gates may additionally open only in a direction, or they might be bi-directional.