Description: The MTS Manual is a series of volumes that describe in detail the facilities provided by the Michigan Terminal System. The MTS command extension and macro processor is a special set of system programs that act as an interface between the user and MTS. The processor has the following capabilities: (1) Provides a series of command extensions which allow the setting and displaying of system variables that describe the current status of MTS; (2) Provides conditional commands that allow flow control depending on the results of previous commands, programs, or system variables; and (3) Allows the user to create procedures (or macros). This volume is divided into two sections, a tutorial section and a reference section.