MacMAME uses ROM (read-only memory) images culled from arcade classics.

CNN: Arcade-game emulator released for Macs

It can fit 30, 000 images onto its 1-gigabyte memory.

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Rather than storing hundreds of target images in conventional, power-hungry electronic memory, they used a holographic memory.

ECONOMIST: Optical recognition

The watch contains a 25, 000-pixel complementary metal oxide semiconductor sensor and 1 megabyte of memory, which can store up to 80 images at a time.

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The Nokia Lumia 800 includes a camera with Carl Zeiss optics, high-definition video, 16GB of internal user memory and 25GB of free SkyDrive storage allowing users to store images and music.

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