backup and data archivation 139 data warehouses 55 software 32 hardware 21 firm 16 cloud computing 14 storage area networks 14 more ... disk memories 9 network applications 9 virtualization 9 renewal 8 memory devices 8 servers 8 public data networks 7 magnetic tapes 6 management information systems 6 computer security 6 document delivery services 5 computer networks 5 data transmission 5 archives 4 digitalization 4 operating systems 4 tests 4 Linux 3 architecture of computational systems 3 database systems 3 electronic sources 3 file systems 3 computer technology 3 less ...