When touching a welcome screen, the video display switched to a screen displaying the BIG letters A to Z. The user then touched the first letter of the last name of the person to which they wished directions. The screen then switched to an alphabetically sorted list of of persons whose last name began with the letter that was touched. Eventually touching the full name of the person being visited, the video display switched to a map of directions to his/her office and a small printer built into the touchscreen kiosk printed directions, cut the 5 inch wide paper and popped it out of the center of the kiosk just below the video display.
As I recall, the touchscreen program that I wrote in assembler could handle up to 65,000 names. I believe that this Ford Research Center touchscreen information system installation by Lexitech, Inc., initially had about 3000 names and directions installed.
Our Lexitech Touchscreen Information Systems were also installed at large hospitals throught the U.S. and Canada. Some hospitals were as large as 35 acres with 25 buildings, so a touchscreen system was installed at all main entrances. The touchscreen information systems reduced the workload of the personnel at the Information Desks so much that Information Desk personnel reductions paid for each touchscreen installation in about 12 months.....a very cost effective investment.
I created about one dozen different Touchscreen Systems for my son Lex's company before retiring. All were created in IBM assembly language.