Kind of class hierachy table. If you have better idea for presenting it,
or want to make some graphics, welcome.
Letters inside [] brackets stand for:
S - Streamable
N - Nameable
T - template

VMObject
    Attack
    Affect[S]
    Action[SN]
        Spell_Action
    Exit[SN]
    Repop
    MudObject
        Room[NS]
        Area[NS]
        Thing[N]
            Char[S]
                PC
                NPC
                    Shopkeeper
            Object[S]
                ObjArmor
                ObjContainer
                ObjCorpse
                ObjLiquidContainer
                ObjGold
                ObjFood
                ObjWeapon

Editor
    RoomEditor
    NPCEditor
    ObjEditor
    AreaEditor
    HelpEditor
    TextEditor

StaticInput
    InputFile
    InputBuffer
    InputString
DynamicInput
    InputSocket (not finished)
Output
    OutputFile
    OutputBuffer
    OutputSocket (not finished)


StringRep
String

Modifier
Index
Weather
Environment
ShopTrade
Social[N]
Help[NS]
Guild[S]

Host
Server
Descriptor
Socket
    SocketBuf
Buf

Error
Spell
Random
countedThing
Vector

Array[TS]
HashNode
HashTable[T]
Node
LList[T]

MemoryBlock
    AsmObjFile
    VMachine
AsmParser
VMarray