About 30 years ago I was working for a restaurant chain. I got hired by accident, (long story), but ended staying for 9 years. I went where ever they were opening a new place, and in 1998 they were moving to a new software based cash register system to simplify the billing and to eliminate the need for any extensive training in ringing up both bar items and food.
I had gotten through setting up one new location, which still had part of an adjacent hotel under construction, I was staying on there to oversee that project as well, and to get the place open on time.
I was out one day and happened on a Chinese restaurant and decided to stop for dinner. They were having fits trying to deal with a similar system that had all but locked up at 7pm on a Sat. night. When they couldn't ring my dinner up, I offered to take a look, after some translation help from their daughter I managed to find the problem and get it up and running.
They were grateful for the help and the daughter told me that the company that supplied the new system just set it up and handed them the 5" thick software manual. I told the daughter if she stopped by where I was working I'd give her a bit of help on programming the system. She did, but what we had done was different than what they needed to in Chinese. I went a few days later and with lots of help in translation I managed to get the Chinese language system working as it needed to, and in doing so the daughter gained a bit of understanding on how to it all worked.
I got to be pretty good friends with them, especially the daughter and spent a good deal of time there over the next two years helping them both with the system and several other newer pieces of equipment they had bought, through a company I also worked with.
In being there so often and her at my place as well, I learned a good bit of their menu and to this day still make my own Chinese takeout having acquired the know how back then. I've shocked quite a few people over the years being able to make things accurately. I moved away from that area over 25 years ago now and both the place I worked for and the Chinese joint are long gone. Its good to be able to cook something that you actually prefer to eating out.
It really came in handy during the 2020, and here now that most of the local take out places have closed up or gotten to expensive.