In its infancy software tuning was often performed by under-trained personnel using very simple equipment on very simple circuitry. As the industry advanced, the complexity of the systems grew and it became increasingly difficult for companies to continue offering products. Unfortunately the technology advanced faster than the technical capabilities of these companies and subsequent problems arose. Early attempts to resolve this often resulted in companies neither having the electrical nor the mechanical background to build a product that was both safe and powerful. Even today most of the current tuning companies still adhere to the old technology and black wizardry of trial and error tuning.