Compact form factor for an automated tape cartridge autoloader/library system

A tape cartridge autoloader library system including at least one read/write tape drive, a tape cartridge picker, a single tape cartridge interface, and a pair of tape cartridge magazines within a compact form factor that fits into a standard library rack mount. The autoloader/library system is a complete tape cartridge library that stores, manages, and automatically exchanges a plurality of tape cartridges between the tape drive, the single cartridge interface, and the pair of tape cartridge magazines. The tape cartridge magazines are each configured to receive and store a plurality of individual tape cartridges in a horizontal relationship. The tape cartridge magazines transport the individual tape cartridges within the tape cartridge magazines so that an individual one of the tape cartridges is in position for selection by the cartridge picker. The cartridge picker rotates to exchange tape cartridges between one of the tape drive, the pair of tape cartridge magazines, and/or the single tape cartridge interface. The single cartridge interface exchanges individual tape cartridges between an operator and the autoloader/library system.