AISch2

Operations performed on data to generate useful information.

Data input

Data processing

Data storage

Information output.

Document with the original data (order form, invoice etc).

Document that needs additional data and is returned to the sender (eg. check).

- sequence codes (consecutively numbered)

- block codes (block of numbers reserved for specific data)

- group codes (digit position determines meaning)

- mnemonic codes (letters and numbers)

Something about which information is stored (person, product, etc.).

Characteristic of an entity (pay rate, address, etc).

Place where attributes are saved.

Group of related attributes about an entity.

Group of related records.

- transaction (records from a specific period of time)

- master (permanent; updated by transaction)

- database (set of interrealted files).

creating

reading

updating

deleting data.