Apparatus for controlling the storage of data; apparatus for data storage; apparatus for the storage of data; apparatus for the storage of pictorial data; apparatus for the storage of textual data; computer apparatus for the storage of data; computer data storage apparatus; computer installations for the storage of data; computer networks for the storage of data; computer programs recorded on data storage materials; data processing apparatus for use in information storage; data storage apparatus; data storage apparatus for computers; data storage apparatus for use with data processing apparatus; data storage devices; data storage devices bearing data; data storage devices containing photographs; data storage devices for recording computer programs; data storage devices for recording data; data storage discs; data storage installations; data storage instruments; data storage machines; electronic data processing apparatus for the storage of computer programs; electronic memories for the storage of computer data; external storage apparatus for use with data processing apparatus; information storage devices for use in data processing apparatus; instruction programmes for the storage of data; magnetic components for the storage of data; magnetic data storage materials; magnetic discs for data storage purposes; magnetic discs for the storage of data; magnetic disks for data storage; magnetic disks for the storage of data; magnetic materials for the storage of data; magnetic tapes for the storage of data; recording materials for the storage of data (magnetic); solid-state electronic data storage materials; storage apparatus for computer data; storage materials for data in electronic form; storage materials for data in magnetic form; tape units for backing up computer data storage devices; tape units for backing up computer data storage systems