We'd generally put a bushel of cut in half apples in the 'big pan'. Not sure of the size, but it was a really big soup pot maybe four or five gallons? Add a little water and steam cook the apples to soft. Then they'd be run through a ricer to make applesauce. About a case of that would be canned up as pints or if we had enough apples, then quarts. The rest would be put in a big flat pan or two and put into a slow oven for hours until it had cooked down by about half. Some cinnamon, cloves, nutmeg, occasionally cardamom or other similar spices would be stirred in there and if it wasn't thick enough, baked some more. Then we'd generally put it up in pints.
We had an uncle who kept an apple and peach orchard mostly for his bees, he didn't really do much with the fruit so we had bushels and bushels of fruit each year. There was apple and peach butter since that took up less space in the jars.