The DTC program provides an on-line, appointment scheduler and calendar facility. The program currently supports three basic functions: Month-At- A-Glance, Week-At-A-Glance, and Day-At-A-Glance. The options are D for Day, W for Week, and M for Month. If no option is given, the DTC options menu is displayed. Options are then solicited after each display, until the user types Q (quit), or EX (exit). The date format is mmddyy for Day and Week, and mmyy for the month part. The option: D 010383 displays appointments for January third, 1983. The option: 9:00 would insert the appointment specified by appointment string in at 9 am on the default date. The default date is the last date given. Dates may be given as mmddyy, mm/dd/yy, or dd-mmm-yy. Entries in the DTC file of form "999999080filename.typ=" point at the filename and the S or G cmds enter appts. in them; other cmds read them. Use the F cmd to change files. A normal command to enter an appointment might be: >DTC D 010183 9:00 Fred Taylor interview Time ranges of form hh:mm>hh:mm give intervals; don't omit 0's. Inserting a time (or EV for evening) followed by an appointment will enter that appointment on the current default date. Dates can be given as mmddyy, dd-mmm-yy, or mm/dd/yy.