OOP question. Are these Objects right?

From: Bill_Richie (Bill34521_at_hotmail.com)
Date: 11/27/04 

Date: Sat, 27 Nov 2004 08:12:58 -0500

Heres the question that i identified them from (i am new to OOP), then
after the question are what i think are the objects, if anyone could give
me any pointers as to if ive messed anything up badly:

A software system is required to control a security system. The system
consists of an entry panel at each entrance, both external and room and
corridors inside. The panels will be a mixture of a numeric keypad with an
LED display and a card insert or a swipe card. Each panel controls entry
through an electronically controlled door. A local controller can control
up to ten entrances. A centralised controller maintains lists of users and
the rooms (or zones) they currently occupy. This information is requested
the local controller or periodically if an authorised member of staff
requests it.

Both the local and central controllers should be able to display who is in
each room (or zone) at any particular time. For safety reasons there should
be an override that will unlock all doors in the event of an emergency.
Local controller overrides will unlock only the doors it controls, the
central controller override will unlock all doors in the building. The
system will receive information from the fire detection system and act
accordingly. The system should automatically inform the emergency services
(you can assume that the emergency services are capable of receiving the
data)

Objects:
Security system
Entry Panel
Entrance
Panels
Local controller
Centralised controller
users
Override
Fire detection system
Swipe card
Keypad

If anyone could tell me if i have done anything majorily wrong or missed
anything really important off, thanks!

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