Differentiate manual database to a computerized database?

A manual database is a paper based database. A computerized database is one which is held on a computer in an organised manner. A computerized database is more advantageous than manual database in terms of speed, flexibility, and ease.

A manual database would normally be data held on paper. So this could be things like a phone book or address book, or files held in a filing cabinet. A computerised database is held on a computer in an organised and structured form. Usually this is done using a database application such as Oracle or Access etc. It is easy to manipulate and extract data, so far more efficient than a manual database.