Singleton: How should it be used

Question

Edit: From another question I provided an answer that has links to a lot of questions/answers about singletons: More info about singletons here:

So I have read th

Answer 1

Because a singleton only allows one instance to be created it effectively controls instance replication. for example you'd not need multiple instances of a lookup - a morse lookup map for example, thus wrapping it in a singleton class is apt. And just because you have a single instance of the class does not mean you are also limited on the number of references to that instance. You can queue calls(to avoid threading issues) to the instance and effect changes necessary. Yes, the general form of a singleton is a globally public one, you can certainly modify the design to create a more access restricted singleton. I haven't tired this before but I sure know it is possible. And to all those who commented saying the singleton pattern is utterly evil you should know this: yes it is evil if you do not use it properly or within it confines of effective functionality and predictable behavior: do not GENERALIZE.