There are three types of data processing methods namely:
A paper and pen are used to process in manual data processing example: Most schools in Kenya process t
heir data manually especially while admitting form 1s. As the students report, they are given a form to fill, these forms are filed by the school secretary and stored in the file cabinet- that is, if the school has 450 students, the school secretary will have those 450 files to handle thus retrieve, store, manipulate and update information which is a tedious job. therefore manual data processing can also be defined as the physical entering and organization of data
In mechanical data processing, data is processed with different mechanical devices. This can include typewriters and calculators
Electronic Data Processing (EDP) can refer to the use of automated methods to process commercial data. This means that, data processing, retrieval, storage, manipulation, sorting and part of analysis is done through automated methods using devices like computers.
A file can be defined as a collection of related records that give a complete set of information about a certain item or entity.
A computer file is made up of three elements namely:
A character refers to a letter, number or symbol that can be entered, stored and output by a computer. This is the smallest element in a computer file.
A field is a single character or a collection of characters that represent a single entity
A record is a collection of related fields that represent a single entity.
Computer files are classified as:
This is computer file viewed in terms of what data items it contains and details of what processing operations may be performed on the data items. It does not have implementation specific information like field and data types, size and file types.