Attunement? - Dark Souls
For Dark Souls on the Xbox 360, a GameFAQs message board topic titled "Attunement?".
Attunement Slots - Cinders - Wikidot.com
Attunement determines your character's attunement slots, casts per spell, and casting speed.
DnD 5e Wild Magic Sorcerer Build Guide - CBR
These boots don't even require attunement to use, either. ... This item also requires attunement, but for many characters, it's worth the attunement slot.