Working in the industry for two decades, I have witnessed the evolution of a lot of technologies. Most are not entirely new, just different implementations of old ideas. Basically, current IT systems are very similar to those from twenty years ago, but much faster and imaginatively implemented. I have studied, used and applied different combinations of these both personally and professionally. These combinations can, in loose terms, be described as different systems, both hardware and software, integrated according to its intended application. Actual integration may be as simple as hardware and software installation or as challenging as custom programming and interfacing of equipment.