I am still paranoid about the use of those two terms. About 25 years ago, when I was young and ****y, I was working in a plant that had a Westronics "chart recorder /logger, that displayed all the plant data to the operators. ie it was the total "brains" of the plant.
I took it upon myself (nobody asked me) to get a pc to "talk" to this device. I found an old floppy disc with some dos type software, made up a rs232 lead and congratulated myself in getting it working first time.
I decided how clever, I would be, if I made a "backup" of the recorder,
I obviously got "upload" and "download" mixed up, probably ignored some "overwrite" warning and long story short, 5 seconds later, I had replaced the entire memory of the recorder with my blank file.
The entire plant now had no information, I had no idea where any of the sixty or so instruments were connected, what they were scaled to etc , I had to manually enter each "point" , guess the scaling and ask the operator, do you remember what "point 5 used to be etc etc. The operator had to "blindly" run the plant, the worst two days, I ever had and all self inflicted. lol
