American Nitrox Divers International (or ANDI) was founded by Ed Betts and Dick Rutkowski in 1988.

[3] ANDI was founded by Ed Betts and Dick Rutkowski in 1988 for the following purpose - "to standardize Instructor Training, Sport Diver Training, and refill station dispensing procedures for Enriched Air Nitrox diving.

[5] Between the years 1989 and 2000, ANDI is reported by the Divers Alert Network as certifying 49,118 divers out of a global total of 233,798 in the use of nitrox along with the certification of 3,196 instructors (out of a global total of 32,924) to specifically teach nitrox.

[6] ANDI offers training programs for recreational diving, use of nitrox, technical diving (including rebreather), gas blending, equipment service, diver first aid and hyperbaric chamber personnel.

[16] ANDI ratings for recreational diving supervision and instruction are recognized by the Health and Safety Executive in the United Kingdom as of 2015.