1. 4.4bsd dump and restore for ext2 filesystems Dump examines files on a filesystem and determines which files need to be backed up. These files are copied to the given disk, tape or other storage medium for safe keeping. The restore command performs the inverse function of dump. A full backup of a file system may be restored and subsequent incremental backups layered on top of it. Single files and directory subtrees may be restored from full or partial backups. From Debian 3.0r0 APT

2. The dump package contains both dump and restore. Dump examines files ina filesystem, determines which ones need to be backed up, and copies those files to a specified disk, tape or other storage medium. The restore command performs the inverse function of dump; it can restore afull backup of a filesystem. Subsequent incremental backups can then belayered on top of the full backup. Single files and directory subtrees may also be restored from full or partial backups. From Mandrake 9.0 RPM

3. n. 1. An undigested and voluminous mass of information about a problem or the state of a system, especially one routed to the slowest available output device (compare core dump), and most especially one consisting of hex or octal runes describing the byte-by-byte state of memory, mass storage, or some file. In elder days, debugging was generally done by `groveling over' a dump (see grovel); increasing use of high-level languages and interactive debuggers has made such tedium uncommon, and the term `dump' now has a faintly archaic flavor. 2. A backup. This usage is typical only at large timesharing installations. From Jargon Dictionary