| InvPageTable | Info about each page # |
| PageTable | One page-table element |
| Process | The structure that defines a process |
| SegList | Structure defining the nodes of linked lists of segments |
| TokenType | A structure defining the type and subtype of a token |
| ToyMem | The main memory type union |
| ToyMem_Instruction | Holds one instruction |
| ToyMem_Integer | Structure to hold a single integer |
| ToyMem_String | Structure to hold a NULL-terminated ASCII string up to MAX_STRLEN chars in length |
| ToyMM | Structure that defines a Toy Memory Manager |
| ToySegment | Structure that defines a segment |
1.3-rc3