- Initialism of identical by state.
- Initialism of irritable bowel syndrome.
2013 March 28, Kwalkerred, “Works so much better than other brands! (Customer Reviews: American Health Acidophilus and Bifidus Chewable Strawberry -- 100 Wafers)”, in amazon.com, retrieved 2013-10-27:
- I've suffered from a sensitive tummy for years - which is now more unhappily known as IBS. I happened upon American Health Acidophilus at a local store a few years back and, as it was on sale, I thought I'd try it out. What a difference! After a few days my tummy settled down and rarely gave me any trouble. And they are delicious! Of course being irresponsible, I often forget to take these wafers, so my gut lets me know, but for me, anyway, these chewables really are the ticket to a more smoothly operating digestive tract.
- Initialism of Inbetriebsetzung.