User interface must only display plain languages that have been explicitly specified before hand. The set of such language ROBACUS is relying on is the universal language, derived from an abbreviated set of English.

The user interface provides the major categories of analysis. Click to invoke the particular category of interest. You can also type in 1,2,3... for the 1st, 2nd, 3rd ... category. Pressing the [Enter] key invoke the robot value, which is indicated by the mouse pointer.

The superoptions, Edit and Diagno, can be clicked or invoked by entering 'e filnam' and d. Simply entering an 'e' edits the previously editted filnam. Similarly, the suboptions can be invoked by clicking or the first letter of the option name.

Besides the e and d, and other suboption commands, you can set up(3-letter) alias by entering ALI=actual command, which can be either ROBACUS or unix. Enter an = will display all available alias. Doing a ALI= will delete the ALI.

Pressing [Backspace] brings you to the backgroud terminal display. Pressing [Enter] brings back the user interface. Ctrl+C closes the user interface.

When processing is deep into an actual analysis, the pressing of the right button of the mouse will cause the execution to perform on its own, with possible user intervention by clicking the mouse at a specific step.

The use interface is invoked by file useint, which iteratively execute file tooexe and useabs. tooexe contains the next process requested by the user, and useabs is just the absolute of the user interface program, which also does automated bug check to see if the process run successfully. If not, it proceeds to do automatic debugging.

2.13 EDITOR SPECS

2.14 DIAGNOSER SPECS

2.15 DATA FILE LINK SPECS

2.16 COMPUTER ENGLISH WORDS

2.17 UNIVERSAL LANGUAGE FOR COMPUTING

2.18 SPACE NUCLEAR DESIGN ANALYSIS

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