| intro : | Introduction to System Calls. |
| cast : | Defines a type cast in the name space converter set. |
| change : | Changes the current working box. |
| chinfo : | Change the box information. |
| copy : | Copies one box to another. |
| delete : | Deletes a box. |
| dot : | Obtains the current working box. |
| forget : | Forgets the name for a box in the name space. |
| import : | Imports a box under a given name in the name space. |
| info : | Get the box information. |
| kind : | Get the box type. |
| link : | Links one box to another. |
| make : | Makes a box. |
| selectors : | Get names for inner boxes. |
| uncast : | Undefines a type cast in the name space converter set. |
| intro : | Introduction to Library Functions. |
| die, atdie, delatdie : | Natural death. |
| draw, initdraw, ⋯ : | Graphics |
| error, catcherror, noerror, errmsg : | Error handling. |
| exists : | Checking the existence of a box |
| spawn, die : | process handling functions |
| bufbox, vmboxaddr, vmbox, varbox : | Boxes for process memory |
| intro : | Introduction to System Boxes. |
| chan : | Channel boxes. |
| con, tcp, udp : | Network connection boxes |
| fs : | Native file system boxes. |
| mem : | System wide memory boxes. |
| proc : | Processor boxes. |
| sys : | Machine boxes. |
| term : | Terminal boxes. |
| usr : | Human user boxes. |
| vm : | Virtual memory boxes |
Section 5:
Op, the Box Protocol.
| intro : | Introduction to Op, the Box Protocol. |
| chinfo : | Box information update |
| copy : | Request box copy |
| delete : | Request a box deletion |
| getmem, putmem : | Transfer box contents. |
| kind : | Get box information |
| link : | Request a box link |
| make : | Request a box creation |
| selectors : | Get box information |
| status : | Reply to a request with status condition |