Quipus were the main system employed by the Incas to record information.  

Moche Apogee Epoch, 1 - 800 AD.  Warriors preparing for ritual combat.  To show their high social position they dressed themselves with feather ornaments, ear plugs, breastplates, necklaces, bracelets, decorated shirts, backflaps, rattles and face paint.  They carried shields and weapons such as clubs, lances, and spear-throwers.

Moche Apogee Epoch, 1 - 800 AD.  When a warrior removed another's helmet or grabbed his hair the combat was over.  The defeated warrior was stripped and his weapons and clothes were wrapped in a bundle.  The victors led the defeated warriors by ropes around their necks to their final destination: the place of sacrifice.

Moche Apogee Epoch, 1 - 800 AD.  In Moche art the gods were represented fighting each other or against humans.  These battles ended with the decapitation of the opponent.  The god here is holding a half-moon shaped knife known as a tumi.

Formative Epoch, 250 BC - 1 AD: Moche Sculptural nose ornaments

Formative Epoch, 250 BC - 1 AD: Funerary attire

Gold ear ornaments, with inlays of chrysocolla, sodalite, turquoise, mother of pearl, and spondylus shells.  Some were so heavy and large that they were held in place by bands wrapped around the wearer's head.