When I went to the university to get my BSEE we were taught current flows from positive to negative and we did all of our calculations with this convention. The textbooks throughout our electrical engineering courses used this convention. And yet we were taught the truth: that current actually flows from negative to positive. Nevertheless, science persists in the conventional positive to negative direction. The calculations are based on this presupposition and they work no matter which way the current actually flows. Okay, so far so good. But then I run into electrical technician sources and they insist on thinking in terms of negative to positive such that the little arrows on the diode and transistor symbols are backwards. Why is this counter intuitive system of thinking gaining ground? I, for one, will never draw my KVL loops backwards, for that would involve the complication of most of the numbers being negative. I like to work with positive numbers. Any thoughts on this?