At Software Services of Delaware I worked with the Three Little Bakers Dinner Theater on their reservation system. This system was used for their call center to create reservations, seat people at specific tables for dates and shows and print tickets. The seating was a graphical interface before Windows, using a C graphics library and trigonometry to draw tables and seats at various locations and angles of the different dining room floor setups. Also, we programmed the mouse input device pre-Windows.
At Software Services of Delaware I did create device drivers and terminate and stay resident programs. (TSRs) The TSRs were to handle keyboard and mouse inputs and emulate multitasking.
As SSD was scaling down their software services to cater more to networking, when I left SSD the Three Little Bakers requested from SSD that I be able to continue to help them maintain and enhance their systems. I worked with TLB the next few years while I was working at Rollins Truck Leasing.