The ABC programmer interface you have been using is your primary interface for development. However there are occasions when you would like to perform some simple system maintenance without using the windowing system. System mode is provided for that purpose.
Objects are relative to the master directory.
A load file is a special file which is used to specify the object name and associated external filename during importing. An example is shown below. The objects are listed one per line. This name must be followed by at least one space, a colon, at least one more space and a name. The import option will read each file, build the object and store it in the environment under the name you have given.