Certainly, you understand the systematic nature of the business. Any entity is a large system made up of small subsystems. Your credit card reader is part of these sub-systems. When considering one, you need to ensure that it can integrate and work consistently with other systems in your business. Also, this reader must have features which enable it to merge with the current and future system. For instance, with the development of the internet of things technology, you might need a credit card reader that supports wireless connectivity. Hence, you should be observant to ensure your choice has the right features for making it part and puzzle of current and future technologies. Ignoring this aspect means that you will need to spend extra cash in the future to replace it.