The smallest logical data entity is called a data item or data.
The smallest logical data entity is called a data item or data Field.
Data stored in computer systems form a hierarchy extending from a single bit to a database, the major record-keeping entity of a firm. ... Bit (Character) - a bit is the smallest unit of data representation (value of a bit may be a 0 or 1).
A field consists of a grouping of characters. A data field represents an attribute (a characteristic or quality) of some entity (object, person, place, or event).