The process of obtaining statistical data from documents not primarily designed for this purpose is called extraction 1. In general, whatever its source, statistical information is subjected to processing 2 which may be manual 3, mechanical 4, electronic 5 or a combination of these modes. Manual processing involves no equipment more complex than the desk calculator 6. Mechanical processing uses tabulating machines (224-2) or punch card (224-3) machines; electronic processing uses computers (132-2*). Regardless of the mode of processing, certain types of operations 7 must be performed including editing 8 of the data, tabulation (130-6*) and calculation (132-2) and table preparation 9. These operations are made more or less complex depending on the mode of processing which is selected.
- 1. Extraction, n. - extract, v.
- 2. Processing ,n. - process, v. The terms to process information, data processing, are used widely.
- 8. Editing, n. - edit, v. In English, the term refers to an operation performed either on the basic document or on the machine - readable data, to correct inconsistencies or eliminate omissions. In French, edition refers to the stage of table preparation.