I suggested in Section 29.1 that the objects manipulated by users should be drawn from their domain rather than from a computer domain. Suggest appropriate objects for the following users and systems.

• A warehouse assistant using an automated parts catalogue
• An airline pilot using an aircraft safety monitoring system
• A manager manipulating a financial database
• A policeman using a patrol car control system

(a) Warehouse assistant using a parts catalogue. Objects are parts, part
numbers, stock, etc.

(b) Airline pilot using a safety monitoring system. Objects are aircraft sub-
systems e.g. engine sub-system and their performance parameters.

(c) Manager manipulating a financial database. Objects are stocks, bonds,
investments, interest rates, etc.
(d) Policeman using a patrol car system. Objects are other cars, locations, types
of incident, etc.