Inter IKEA Systems B.V., trading as IKEA, is a Swedish multinational conglomerate that designs and sells ready-to-assemble furniture, kitchen appliances, decoration, home accessories, and various other goods and home services. Started in 1943 by Ingvar Kamprad and currently legally headquartered in the Netherlands, IKEA has been the world's largest furniture retailer since 2008. The brand used by the group is derived from an acronym that consists of the founder's initials, and those of Elmtaryd, the family farm where he was born, and the nearby village Agunnaryd.

Ready-to-assemble furniture (RTA), also known as knock-down furniture (KD), flat-pack furniture, or kit furniture, is a form of furniture that requires customer assembly. The separate components are packed for sale in cartons which also contain assembly instructions and sometimes hardware. The furniture is generally simple to assemble with basic tools such as hex keys, which are also sometimes included. Ready-to-assemble furniture is popular with consumers who wish to save money by assembling the product themselves.