DejaVuPortableOps Cropped2 "Hmm, I don't remember that one. It mustn't be that important."
This article is about a subject from outside Hideo Kojima's core "Metal Gear Saga." It has some level of canonicity within the continuity, but reader discretion is advised.[?]

Holochips were a type of data storage device in use during 2018. They could store images and project them in 3D images via reflecting light at different angles, giving the appearance of a hologram, hence the name. They could store huge amounts of data at a extremely good rate of speed, and were fairly durable. These qualities resulted in it being a preferred data store for cyborgs' combat data (stored in their left hands), as well as for VR data recorded for UGs. They came in three sizes: small, medium and large.

Behind the scenes

Holochips are collectable items within Metal Gear Rising: Revengeance. They can be procured by stealth killing a cyborg or UG, or by destroying it in battle. In addition, they could also be collected from various containers throughout the game. Collecting these chips allow for a BP bonus.