> What does "outside-of-memory" data compression algorithm mean, exactly? Not RAM or ROM. Buffered from a device: database cluster, disk blocks/files, network

> What does "outside-of-memory" data compression algorithm mean, exactly? Not RAM or ROM. Buffered from a device: database cluster, disk blocks/files, network packets, serial port, ... To be complete, going the other way: ..., "in-cache", or "in-register" data compression