> He might have to provide more info. When I looked up Billy to find out what it is I found over a dozen variants/sizes: http://www.ikea.com/us/en/search/?query=BILLY+Bookcase

http://www.ikea.com/us/en/catalog/products/00263850/ is the one most people mean when they talk about "a billy": a neutral person-tall thin enough to be flexible bookcase.

> Personally, I love these and have a few: http://www.ikea.com/us/en/catalog/products/30275861/#/102758....

I also like Kallax, not the 4x4 or 5x5 though (too inflexible imo) but I've got multiple 2x4, 1x4 and 2x2.

He was referring to this one (color unspecified): http://www.ikea.com/us/en/catalog/products/00263850/

There's nothing notable with that bookshelf except the price. That model has simply been the most basic/cheap bookcase at IKEA (and elsewhere) for decades, a must have for young adults moving out of their parents'. I still have two after many years.

Incidentally, I'm getting that very same KALLAX you linked to in a couple of weeks as a room separator.

I've always thought that "Billy" unqualified meant that one.

Same for me, my friend, and almost everybody I know. That thing is a true standard.