As any good electronic engineer will tell you, RS232 has been around for a long time. Since the 1960's and until recently has been found on the back of computers across the world. So why has this blast from the past lasted so long and why is it worth us learning about it. Well in a nutshell it's quick simple and easy to learn, there is nothing more simple than an RS232 connection, secondly it is pretty much everywhere: It has been around since the 60's meaning you won't have any trouble finding documentation online for it and the amount of support it gets from consumer devices is still getting strong. However recently it has been fading away, my PC no longer has an RS232 connector on the back so I had to get a USB to RS232 cable which works perfectly. If you were to get into any type of data coms I would recommend looking into RS232 as it is a great way to learn how the communication works exactly and from there it is easy to build up into more advanced systems.