The first commerical type was the screwdriver, made in the UK, very hard to get, only available with 901 atomizer, long lead time. The first homemade mod was made from a flashlight, no commerical connectors available, had to break apart a ecig battery to get one. Only 801 and 901 atomizers were available then. My first purchased mod was called a lightsabre, it used some sort of modified cable connector for the 801 atomizer and a 18650 battery. Pure Smoker was the first to offer off the shelf mods in the US called Prodigy. Man things have come a long way. I registered with ECF in 2009, don't post much but read every day.