CIMM DEFINITION: A form of data storage that improves a device’s performance by storing the data in a form that is easily captured and deleted.

2: A local copy of measurement data maintained for some period of time on cable Set-Top Boxes  and other computers/servers in the data collection and processing chain to prevent data loss in the event of network and server outages. (Source: FourthWall Media)

3: Memory used to temporarily store the most frequently requested content/files/pages in order to speed its delivery to the user. Caches can be local (i.e. on a browser) or on a network. In the case of local cache, most computers have both memory (RAM), and disk (hard drive) cache. (Source: IAB)