The TAB found it's origin from it's original designer. Tabbert, the name of the European company, based in Denmark, created the trailer in the early 2000's. By abbreviating the name of the company (from Tabbert to TAB), they also described the diminutive nature of the trailer (from a full-sized RV to an abbreviated RV). With the name 'TAB' now created, inserting the '@' in lieu of the 'a' was done so more or less for 'style points'-as means of differentiation and branding. The name TAG was an obvious choice as a smaller version of the TAB was developed. Keeping consistent in branding, yet changing the word to refer to the even smaller trailer as a 'tag-a-long'.