SENAC documentation comes in printed and on-line forms. All of the on-line documentation is included in the system, no matter what interface options are chosen by the user. The documentation for SENPACK and SENGRAPH is not on-line. The on-line help of each VMS implementation is structured in the form of a VMS help library and can be accessed from the command interpreter (DCL) as well as from SENAC. The Unix versions are accessed using the Unix function ”more”.