Conventional and acupuncture-like TENS are two general descriptions for parameter settings. Others like "high-frequency-low-intensity TENS" and "low-frequency-high-intensity TENS" are in use too. They are really not the only ones and like I said, one could debate for hours about what is right or wrong. My suggestion is not to use these general descriptions but to focus on what is the goal of using the TENS current. If the goal were to stimulate muscles, there would again be complete different parameter settings. Next to that I often stumbled upon literature that left some parameters undiscussed, which is why I made parameter lists with 9 items. There is always room for interpretation but if your purpose is to decrease pain you can rely upon these.