Abstract: A combination includes a family of cartridge drives (12) including a first cartridge drive and a second cartridge drive, and a family of cartridges (14) including a first cartridge and a second cartridge. The first cartridge drive includes a first protrusion pattern (32), and the second cartridge drive includes a second protrusion pattern (32) that is different than the first protrusion pattern (32). The first cartridge includes a first recess pattern (62) that receives the first protrusion pattern (32) thereby allowing full insertion of the first cartridge into the first cartridge drive. The second cartridge includes a second recess pattern (62) that receives the second protrusion pattern (32) thereby allowing full insertion of the second cartridge into the second cartridge drive. The second protrusion pattern (32) can impede full insertion of the first cartridge into the second cartridge drive.