Notes
Objects are containers for your information, but they also give you special functionality.
Objects in Force.com are represented in the form of a table and it is here referred as what an entity in a database.
A field is like a custom Database column. Object field Store the data for our records. Salesforce by default provide few fields with salesforce standard objects.
Records are the rows(entries) in object which are uniquely identified by there ids.
Contact is an object.
Name, Account Name and Title are the fields.
Arthur Song is a record.