=== Terminology ===
^ Term                        ^ Meaning                                                                                                                                                                        ^
| Address                     | Data, which identifies a data unit within storage.                                                                                                                             |
| Common data storage         | Working storage shared between networks of different classification levels or access rights                                                                                    |
| Data                        | Machine-readable information, represented as a bit string                                                                                                                      |
| Data addresses              | Data, supporting the access of data by defining their location in stores.                                                                                                      |
| Data unit                   | Organized addressable sequence of bits (e.g. byte, word, double word)                                                                                                          |
| External software storage   | Data carrier for software                                                                                                                                                      |
| Function                    | Software controlled processing steps of a processor                                                                                                                            |
| Information                 | Binary represented, processable entity                                                                                                                                         |
| Instruction                 | Datum, executable part of Software, controls processors                                                                                                                        |
| Instruction bus             | Interface between processors and working storage; used to retrieve instructions for execution by processors                                                                    |
| Internal data of functions  | Data, part of software, defined to support functions, subject to Software-quality-control and configuration-control                                                            |
| Main processor              | Processor, to support the main purpose of the IT-system                                                                                                                        |
| Malware                     | Instructions, introduced into a system against the intent of its user                                                                                                          |
| Media                       | Means to move data, including data carrier, networks, remote control devices, scanner, and direct-memory-access-devices.                                                       |
| Operand bus                 | Interface between processors and working storage; used to exchange Operands (data, which are not instructions)                                                                 |
| Permanent storage           | Storage, which maintains its contents after powering down the device                                                                                                           |
| Processor                   | Hardware unit, capable of processing data under software control                                                                                                               |
| Program                     | Set of software, generated to solve a system's tasks                                                                                                                           |
| Program addresses           | Data, supporting software branches based on values. They consist of compare values and instruction addresses, and are subject to software-quality- and configuration-control.  |
| System                      | Set of hardware and software, designed to solve specified tasks within a defined environment.                                                                                  |
| Target data                 | Data, input to IT-systems to be processed. In general, these are neither subject to software quality control nor configuration control.                                        |
| Working storage             | Storage for data that is currently used.                                                                                                                                       |