kf2qd:
It is interesting that with Arduino and such we are just going back to the early days of industrial PLC control. 1 processor managing some I/O and making things do their stuff based on some logic and some inputs.
True until you look at who were using PLCs and who are using arduinos and the level of difficulty using PLC vs. arduino 
I thought multitasking was a fancy word for time-division multiplexing with programs. It's always about one unit trying to serve the needs of many. Some people may have confused multitasking with parallel computing, where multiple tasks could be carried out by multiple units at the same time.