Here are the categories currently used in the image.  You should use one of
these if you think your class matches it: for example, use 'System-Debugger'
for a debugger, or 'Collections-External' for disk-based collections, or
'Collections-Sequenceable' when implementing a BitArray...

Category		    Example
-------------------------------------------------------------------------------
'Collections'		    Collection
'Collections-Keyed'	    MappedCollection, Dictionary hierarchy
'Collections-Unordered'	    Bag, Set, IdentitySet
'Collections-Sequenceable'  SequenceableCollection hierarchy
'Collections-Weak'	    WeakSet/WeakLookupTable hierarchies, WeakArray
'Examples-C interface'	    cint subdirectory
'Examples-Useful'	    Autoload, GenClass, Tokenizer, ...
'Examples-Cool'		    Philosophers, Queens, and other examples
'Graphics-Browser'	    ClassHierarchyBrowser, BrowserShell, BrowserMain
'Graphics-Windows'	    Blox and View hierarchies
'InDelv DOM-...'	    xml subdirectory
'Language-Implementation'   Behavior/ContextPart hierarchies, CompiledMethod
'Language-Data types'	    Magnitude/Boolean hierarchies, String
'Language-Processes'	    Process, Semaphore, ProcessorScheduler, ...
'Language-Exceptions'       TrappableEvent hierarchy, ExceptionHandler, Signal
'Language-C interface'      Memory, CObject and CType hierarchies
'Streams'		    Stream, TextCollector
'Streams-Collections'	    PositionableStream hierarchy
'Streams-Files'		    FileStream, File, Directory, ObjectDumper
'System-Compiler'	    Compiler hierarchy
'Sockets-Streams'	    AbstractSocket, DatagramSocket, ...
'Sockets-Protocols'	    AbstractSocketImpl, Datagram, UDPSocketImpl, ...
'Sockets-RFC'		    ContentHandler, URL