Does anyone knows what the codes IEA or WLMKB or more means on the box of an iMac?

I think somehow it means wired keyboard and mouse. Although intuitively I would think

WireLess

Mouse

KeyBoard

But seeing as it's been used since at least 2010 on education price lists...maybe it's

Wired

L_____

Mouse

KeyBoard

I just received an order of 33 new 2015 iMacs, but they came with wired keyboards! They have this acronym in the descriptor

it's the only thing on the descriptor / serial number label that could refer to they type of keyboard it has...